Search Results

TRAPPIST-1 TRAPPIST-1 is a star system located about 39 light-years away from Earth in the constellation Aquarius. It gained significant attention and interest in the scientific community and the public due to the discovery of seven Earth-sized exoplanets orbiting the ultra-cool dwarf star TRAPPIST-1. Here's a detailed explanation of the TRAPPIST-1 system, including information about its characteristics, the potential for atmosphere, and the search for extraterrestrial life or aliens 1. Characteristics of TRAPPIST-1: Star Type: TRAPPIST-1 is an ultra-cool dwarf star classified as an M8V-type star. It is much cooler and smaller than our Sun, with a surface temperature of about 2,550 degrees Celsius (4,622 degrees Fahrenheit). Number of Exoplanets: The TRAPPIST-1 system is known to host seven exoplanets. These exoplanets are designated as TRAPPIST-1b, c, d, e, f, g, and h. They were discovered through the transit method, which involves observing the periodic dimming of the star's light as the planets pass in front of it. Habitability Zone: Several of the exoplanets in the TRAPPIST-1 system are located within the habitable zone, also known as the Goldilocks zone. This is the region around a star where conditions might be suitable for liquid water to exist on the planets' surfaces, a key factor for potential habitability. 2. Atmosphere of TRAPPIST-1 Exoplanets: Information about the specific composition and characteristics of the atmospheres of the TRAPPIST-1 exoplanets is not fully known. Detecting and characterizing exoplanet atmospheres is a challenging task that requires advanced telescopes and instruments. Astronomers have conducted studies to analyze the potential atmospheres of these exoplanets. The presence of atmospheres would be an essential factor in determining their habitability and potential for hosting life. 3. The Search for Extraterrestrial Life or Aliens: The discovery of seven Earth-sized exoplanets in the TRAPPIST-1 system, especially those within the habitable zone, has made TRAPPIST-1 a significant target in the search for extraterrestrial life. The habitable zone is a region where conditions might be right for liquid water to exist, a key ingredient for life as we know it. The search for extraterrestrial life involves looking for signs of habitability and biomarkers, such as the presence of water, oxygen, and methane, in exoplanet atmospheres. It also involves the study of planetary conditions, including surface temperature and radiation levels, to assess the potential for life to thrive. While the discovery of the TRAPPIST-1 exoplanets is exciting, the actual presence of extraterrestrial life remains purely speculative. The search for life beyond Earth is an ongoing scientific endeavor, and it requires more advanced technology and instruments, including next-generation telescopes like the James Webb Space Telescope, to provide more insights. 4. The Possibility of Aliens: The term "aliens" typically refers to intelligent extraterrestrial beings. While the search for microbial life or even simple life forms is a primary focus in astrobiology, the search for intelligent civilizations, often referred to as the search for extraterrestrial intelligence (SETI), remains an active area of research. SETI involves listening for radio signals or other types of communication from advanced civilizations in the universe. So far, no definitive evidence of extraterrestrial intelligent life or aliens has been found. Comparison with Solar System The TRAPPIST-1 system and our solar system are two different planetary systems in the Milky Way galaxy. While both contain multiple celestial bodies, there are significant differences between them. Here's a comparison of the TRAPPIST-1 system and our solar system: Number of Stars: Solar System: Our solar system is a single-star system, with the Sun as the central star. TRAPPIST-1 System: The TRAPPIST-1 system is a multi-star system, consisting of a red dwarf star called TRAPPIST-1 and at least seven confirmed planets orbiting it. Central Star: Solar System: The Sun is a G-type main-sequence star (a yellow dwarf). TRAPPIST-1 System: TRAPPIST-1 is an M-type dwarf star, which is much cooler and less massive than the Sun. Planetary Orbits: Solar System: In the solar system, planets have relatively stable, nearly circular orbits. TRAPPIST-1 System: The TRAPPIST-1 planets have much closer orbits to their star, with some being in the habitable zone. These orbits are closer to their star compared to most planets in our solar system. Planetary Composition: Solar System: The planets in our solar system have diverse compositions. The inner planets (Mercury, Venus, Earth, and Mars) are rocky, while the outer planets (Jupiter, Saturn, Uranus, and Neptune) are gas giants or ice giants. TRAPPIST-1 System: The TRAPPIST-1 planets are believed to be rocky, similar to the inner planets in our solar system. Some may have liquid water on their surfaces. Habitability: Solar System: Earth, in our solar system, is the only known planet with conditions suitable for life as we know it. TRAPPIST-1 System: Some of the TRAPPIST-1 planets are in the habitable zone, where liquid water could exist. This makes them potential candidates for studying the possibility of life beyond Earth. Number of Planets: Solar System: Our solar system has eight recognized planets, with Pluto being classified as a dwarf planet. TRAPPIST-1 System: At least seven planets have been discovered in the TRAPPIST-1 system. Planetary Sizes: Solar System: The planets in our solar system vary in size from small rocky planets like Mercury to massive gas giants like Jupiter. TRAPPIST-1 System: The TRAPPIST-1 planets are thought to be similar in size to Earth and its neighboring planets. Exploration: Solar System: Our solar system has been extensively explored by spacecraft, including missions to all eight recognized planets, numerous moons, and even a few asteroids and comets. TRAPPIST-1 System: As of my knowledge cutoff date in September 2021, the TRAPPIST-1 system had been observed and studied from a distance through telescopes, but no direct spacecraft missions had been sent to explore it. Other Articles..... Dark Energy Multiness of Thoughts The Dream Mission Creation of Mind Loop STAR VFTS102 KEPLER-452b KEPLER-186f Proxima Centauri b

Worm Hole Let's begin the curvature of worm hole What is a worm hole?, how are worm holes formed?, and what is the function of a worm hole?, I will tell you all this in this article today, so first let's talk about what a worm hole is, how these worm holes are made and How it works, so worm hole connects two different places in space, just like a bridge, so that we can cover long distances in a short time, as you see in the image below, worm hole space. It bends like this and we can show it as a circle and a circle is a sphere in 3D, so the worm hole is also like a sphere. By traveling in this, you can bridge the distance between two places in a very short time, but a big question is that how are worm holes formed? We have heard about black holes that they are formed after supernova, but worm holes are We do not know how they are formed, worm holes are not a natural phenomenon, we have to create them artificially. But till date we have not succeeded in creating such a big worm hole, we have definitely done this test on a very small level but it is not enough for a human being, so only some advanced civilization can do this in the future. You are controlling us and they can create a worm hole just like the interstellar movie.

Parallel World Travel We have heard a lot about time travel, it feels good to hear it but only in imagination and theories, we already know the rest of the reality, but today we have brought another theory in front of you which can happen in the past. There is a thesis based on the above but yes, you will definitely feel happy after reading it. Over View.... So let me give you an overview of this theory, in this we have tried to understand how time travel can happen in the past, because we all know that if we want, we can do it in the future, but time can never shrink. This is why it is impossible to travel in the past, but if we say that it is possible and that anti-reaction will increase your interest, then if we have to travel in time then it is possible only in a parallel universe. But we cannot understand the parallel world well yet, so we will have to create this theory accordingly, then the time travel that will happen will happen in the parallel world that we have created with our own thoughts. Because till now the parallel universe has remained only a thesis. So stick to this theory and the whole society will follow you. If you have any questions, you can tell me in the chat box below, I will definitely answer you. Lets begin the journey After starting this I want to ask you question Is time travel in past can be possible because if we do there would be so many paradoxes we have to face like Grandfather paradoxes and Butterfly Effect. If you don’t know about these then might be you think that what’s these..? Grandfather Paradox- Let’s suppose you have a time machine and you traveled in past And unfortunately because of You your Grandfather got killed in his childhood in the age of 6. Then what happen? Just think logically that if your Grandfather never married with any woman then your father will not birth in this world and if he don’t birth in this world You might be not birth in the world So in present if you don’t exists how did you traveled in past and killed your Grandfather? Tricky right… You can read About the Butterfly effect By yourself…. And cause of we are humans and we often made mistakes we can say that there will be a huge chance that we messed up past.. So with this, This is confirm that we cannot travel in past. Even not in the theory. But we are humans and we are free to think and assume don’t we? Of course many scientists claim that past time travel isn’t possible. So my theory is What if we do travel in past and change it but in result nothing will change in our world cause of our mistake or action, Note that I said in our world. As we know we are not alone in the universe there can be a lot of creature like us or advance from us or lower from us in different sector. And there would be a chance that there would be an parallel universe like us. Parallel Universe is a universe which had many similarities and many differences too. This is a hypothesis universe but it can be true. My theory is a mixture of parallel universe and time travel. There are huge chance that we humans will be able to travel in past but the problem will be we can only observe them but can’t change anything if we dare and try to change anything then The past that we traveled will become a parallel universe and continuous it’s own different future than us. In short if we do the grandfather paradox there then even if we kill the grandfather we will be secure but in that died grandfather universe we actually never be able to exists there. It might be the reason why the party of the time travelers by Stephen hawking was empty cause maybe the travelers don’t want to change the universe. With this almost every paradox can be solved. And whenever we felt Déjà vu there would be the cause of we already felt it on parallel universe and we are connected by that ourselves from that universe to this Universe.. Every action has an appropriate reaction We all know that every action has an appropriate reaction, so you must be thinking that you have said that time travel will happen in the past but not in our parallel universe, but will it have any impact in our universe? , Can it have any opposing impact? Well, we can think something now, but because we have given you this universe, it must have been created by imagination and if we do anything in it, we will not see any effect on the present. We will not get it, that is a different matter that this is just our thought, so maybe there can be some reaction. You can tell in the chat box given below whether you have any idea whether this could be a reaction? Chat Section If you have any question ask me here.... Other Articles...... Theories Dark Energy Multiness of Thoughts The Dream Mission Creation of Mind Loop Today Onward Theory STAR VFTS102 KEPLER-452b Proxima Centauri b TRAPPIST-1

LHS 1140b LHS 1140b is an exoplanet that orbits the red dwarf star LHS 1140, which is located in the constellation Cetus, approximately 41 light-years away from Earth. Discovered in 2017, LHS 1140b has garnered significant attention in the field of exoplanet research due to its potential for habitability and its relatively close proximity to our solar system. Here's a detailed explanation of LHS 1140b, including information about its characteristics, atmosphere, and the potential for extraterrestrial life Basic Characteristics: Size and Type: LHS 1140b is a super-Earth, which means it is larger than Earth but smaller than gas giants like Neptune. It has a radius about 1.4 times that of Earth. Orbit: It orbits its host star, LHS 1140, which is a red dwarf star, in the habitable zone. The habitable zone is the region around a star where conditions may be right for liquid water to exist on the surface of a planet, a crucial factor for the potential of life as we know it. 2. Atmosphere of TRAPPIST-1 Exoplanets: Information about the specific composition and characteristics of the atmospheres of the TRAPPIST-1 exoplanets is not fully known. Detecting and characterizing exoplanet atmospheres is a challenging task that requires advanced telescopes and instruments. Astronomers have conducted studies to analyze the potential atmospheres of these exoplanets. The presence of atmospheres would be an essential factor in determining their habitability and potential for hosting life. Habitability Factors: Temperature: LHS 1140b's location in the habitable zone suggests that it may have the right temperatures for liquid water, a key ingredient for life, to exist on its surface. Stable Environment: Being in a stable orbit around a red dwarf star, LHS 1140b is less likely to experience extreme variations in radiation, making it more suitable for habitability. Challenges to Habitability: Red dwarf stars like LHS 1140 are known for their propensity to emit high levels of X-ray and ultraviolet radiation, which can be harmful to potential atmospheres and surface conditions. However, LHS 1140b's proximity to its host star may help protect it from excessive radiation. Search for Extraterrestrial Life: Detecting signs of extraterrestrial life on LHS 1140b would require advanced instruments and observational techniques, including studying the planet's atmosphere for biosignatures such as oxygen, methane, and other chemical imbalances that could indicate biological activity. Upcoming space telescopes like the James Webb Space Telescope (JWST) and advanced ground-based observatories will play a crucial role in characterizing exoplanets like LHS 1140b and searching for signs of life. Comparison with Earth LHS 1140b and Earth are two vastly different planets, each with its own unique characteristics. Here's a comparison between the two: Size and Composition: LHS 1140b: LHS 1140b is classified as a super-Earth, meaning it is larger than Earth. It has a radius about 1.4 times that of Earth. Its composition is not well-known, but it is believed to be a rocky planet like Earth. Earth: Earth is a terrestrial planet with a well-documented composition. It has a radius of approximately 6,371 kilometers and is primarily composed of rock and metal. Distance from its Star: LHS 1140b: LHS 1140b orbits its host star, LHS 1140, at a much closer distance than Earth orbits the Sun. This proximity to its star means that LHS 1140b likely has a shorter orbital period, potentially resulting in different climate and weather patterns compared to Earth. Earth: Earth orbits the Sun at an average distance of about 149.6 million kilometers (93 million miles). This distance places it in the habitable zone, allowing for the existence of liquid water and the relatively stable climate conditions that have supported life for billions of years. Host Star: LHS 1140b: LHS 1140b orbits a red dwarf star known as LHS 1140. Red dwarfs are cooler and smaller than our Sun, which can have implications for the conditions on planets orbiting them. Earth: Earth orbits a G-type main-sequence star, which is often referred to as a yellow dwarf. The Sun is much hotter and larger than LHS 1140, providing Earth with a different energy source. Atmosphere and Climate: LHS 1140b: The composition of LHS 1140b's atmosphere is not well-known, but it's a crucial factor for habitability. Its climate and weather patterns would be influenced by its proximity to its star and the composition of its atmosphere. Earth: Earth has a diverse atmosphere primarily composed of nitrogen (about 78%) and oxygen (about 21%), which is essential for supporting life as we know it. Earth's atmosphere plays a critical role in regulating its temperature and climate. Potential for Life: LHS 1140b: LHS 1140b is considered a potentially habitable exoplanet due to its location in the habitable zone. However, the presence of life or conditions suitable for life on LHS 1140b is purely speculative at this point and requires further study. Earth: Earth is the only known planet with confirmed life. It has a rich diversity of life forms, from microorganisms to complex multicellular organisms, including humans. Other Articles....... Dark Energy Multiness of Thoughts The Dream Mission Creation of Mind Loop STAR VFTS102 KEPLER-452b KEPLER-186f Proxima Centauri b TRAPPIST-1

To see this working, head to your live site. All Posts Categories My Posts Forum Welcome! Have a look around and join the discussions. Sort by: Recent Activity Follow All Categories Create New Post Aagam sanghavi Welcome to the Forum in General Discussion Share your thoughts. Feel free to add GIFs, videos, hashtags and more to your posts and comments. Get started by commenting below. 0 comments 0 Nov 08, 2023 Like 0 comments Comment Aagam sanghavi Forum rules in General Discussion We want everyone to get the most out of this community, so we ask that you please read and follow these guidelines: • Respect each other • Keep posts relevant to the forum topic • No spamming 0 comments 0 Nov 08, 2023 Like 0 comments Comment Aagam sanghavi Introduce yourself in General Discussion We'd love to get to know you better. Take a moment to say hi to the community in the comments. 0 comments 0 Nov 08, 2023 Like 0 comments Comment Forum - Frameless

Publications Space News and Space Magazines

O-TYPE STAR VFTS102 We present a spectroscopic analysis of an extremely rapidly rotating late O-type star, VFTS102, observed during a spectroscopic survey of 30 Doradus. VFTS102 has a projected rotational velocity larger than 500 km s−1 and probably as large as 600 km s−1; as such it would appear to be the most rapidly rotating massive star currently identified. Its radial velocity differs by 40 km s−1 from the mean for 30 Doradus, suggesting that it is a runaway. By : P. Dufton et al 1. Introduction In recent years the importance of binarity in the evolution of massive stars has been increasingly recognised. This arises from most OB-type stars residing in multiple systems (Mason et al. 2009) and the significant changes to stellar properties that binarity can cause (see, for example, Podsiadlowski et al. 1992; Langer et al. 2008; Eldridge et al. 2011). Here we present a spectroscopic analysis of a rapidly rotating (veq sin i ∼ 600 km s−1) O-type star in the 30 Doradus region of the Large Magellanic Cloud (LMC). Designated VFTS102 (Evans et al. 2011, hereafter Paper I)1, the star is rotating more rapidly than any observed in recent large surveys (Martayan et al. 2006; Hunter et al. 2009) and may also be a runaway. It lies less than one arcminute from the X-ray pulsar, PSR J0537-6910, which is moving away from it. We suggest that VFTS102 might originally have been part of a binary system with the progenitor of the pulsar. 2. Observations Spectroscopy of VFTS102 was obtained as part of the VLT-FLAMES Tarantula Survey, covering the 3980-5050˚A region at a spectral resolving power of 7000 to 8500. Spectroscopy of the Hα region was also available, although this was not used in the quantitative analysis. Details of the observations and initial data reduction are available in Paper I. The spectra were normalised to selected continuum windows using a sigma-clipping rejection algorithm to exclude cosmic rays. No velocity shifts were observed between different epochs, although simulations (see, Sana et al. 2009) indicate that 30% of short period (less 1Aliases include: ST92 1-32; 2MASS J05373924-6909510 –3– than 10 days) and effectively all longer term binaries would not have been detected. We have therefore assumed VFTS102 to be single and the sigma-clipped merged spectrum displays a signal-to-noise ratio of approximately 130 and 60 for the 4000-4500 and 4500-5000˚A regions respectively. An O9: Vnnne spectral classification was obtained by smoothing and rebinning the spectrum to an effective resolving power of 4000 and comparing with standards compiled for the Tarantula Survey (Sana et al. in preparation). The principle uncertainties arise from the extremely large rotational broadening and significant nebular contamination of the He I lines, with the two suffixes indicating extreme line broadening (‘nnn’) and an emission-line star (‘e’). 3. Analysis 3.1. Projected rotational velocity The large rotational broadening of the spectral features makes reliable measurements of the projected rotational velocity, veq sin i , difficult. We have used a Fourier Transform (FT) approach as discussed by Sim´on-D´ıaz & Herrero (2007), supplemented by fitting rotational broadened profiles (PF) to the observed spectral features. The Balmer lines have significant nebular emission and hence the weaker helium spectra were utilized, as illustrated in Fig. 1. The He I line at 4471˚A, although well observed, also showed significant nebular emission and was not analysed. By contrast the line at 4026˚A showed no evidence of emission and yielded a plausible minimum in the Fourier Transform for a veq sin i of 560 km s−1. The PF methodology leads to a slightly higher estimate (580 km s−1). The He I lines at 4143 and 4387˚A were observed although they are relatively weak. They and the line at 4026˚A were converted into velocity space, merged and analysed. The two methodologies yielded effectively identical estimates of 640 km s−1; a similar procedure was undertaken for the He II lines at 4200 and 4541˚A yielding 540 km s−1 (FT) and 510 km s−1 (PF). The He II line at 4686˚A was found to be sensitive to the normalisation with a veq sin i of ∼560 km s−1 being estimated. The individual results should be treated with caution but overall they imply that this star is rotating near to its critical velocity, with the mean value for the FT estimates being 580 km s−1. As discussed by Townsend et al. (2004), projected rotational velocities may be underestimated at these large velocities. For a B0 star rotating at 95% of the critical velocity, this underestimation will be approximately 10%. Hence our best estimate for the projected rotational velocity is ∼600 km s−1. A lower limit of 500 km s−1 has been adopted, whilst the upper value will be constrained by the critical velocity of approximately 700 km s−1 from the models of Brott et al. (2011). This estimate is significantly higher than those (! 370 km s−1) found by Martayan et al. (2006) and Hunter et al. (2009) in their LMC B-type stellar samples. It is also larger than any of the preliminary estimates (!450 km s−1) for ∼ 270 B-type stars in the Tarantula survey, although other rapidly rotating O-type stars have been identified. As such it would appear to have the highest projected rotational velocity estimate of any massive star yet analysed. 3.2. Radial velocity Radial velocities were measured by cross-correlating spectral features against a theoretical template spectrum taken from a grid calculated using the code TLUSTY Hubeny (1988) – see Dufton et al. (2005) for details. Five spectral regions were considered, viz. Hδ and Hγ (with the cores excluded); He I at 4026˚A; 4630-4700˚A with strong multiplets due to C III and O II and an He II line; 4000-4500˚A (with nebular emission being excluded). The measurements are in excellent agreement with a mean value of 228±12 km s−1; if the error distribution is normally distributed the uncertainty in this mean value would be 6 km s−1. From a study of ∼180 presumably single O-type stars in the Tarantula survey Sana et al. (in preparation) find a mean velocity of 271 km s−1 with a standard deviation of 10 km s−1. Preliminary analysis of the B-type stars in the same survey has yielded 270±17 km s−1. VFTS102 lies more than two standard deviations away from these results, implying that it might be a runaway. 3.3. Atmospheric parameters While the equatorial regions of VFTS102 will have a lower gravity than the poles (because of centrifugal forces), and hence a lower temperature (because of von Zeipel gravity darkening), we first characterise the spectrum by comparison with those generated with spatially homogeneous models, convolved with a simple rotational-broadening function. We have used both our TLUSTY grid and FASTWIND calculations (Puls et al. 2005), adopting an LMC chemical composition. For the former, the strength of the He II spectrum implies an effective temperature (Teff) of ∼32500–35000 K, whilst the wings of the Balmer lines lead to a surface-gravity estimate of ∼3.5 dex (cgs). For the latter after allowing for wind effects, the corresponding parameters are 37000 K and 3.7 dex. The helium spectra are consistent with a solar abundance but with the observational and theoretical uncertainties we cannot rule out an enhancement. Given its projected equatorial rotation velocity, VFTS102 is almost certainly viewed at sin i ∼ 1. Hence the relatively cool, low-gravity equatorial regions will contribute significantly to the spectrum. Although their surface flux is lower than for the brighter poles, the analyses discussed above may underestimate the global effective temperature and gravity. However, the rotating-star models discussed below suggest that the effects are not very large. We therefore adopt global estimates for the effective temperature of 36000 K and 3.6 dex but note that the polar gravity could be as large as 4.0 dex. Varying the global parameters by the error estimates listed in Table 1 leads to significantly poorer matches between observation and the standard models, but, given the caveats discussed above, those errors should still be treated with caution. For near critical rotational velocities, the stellar mass can be estimated. Howarth & Smith (2001) show that the stellar mass can be written in terms of ω/ωc 2, veq and the polar radius. Assuming that sin i ∼ 1 and adopting the critical velocities from our single star models, we can estimate the first two quantities. Additionally for any given value of ω/ωc, the polar radius can be inferred from the absolute visual magnitude and the unreddened (B-V). The former can be estimated from the luminosity (see Sect. 3.4) and the latter from our effective temperature estimate and the LMC broad-band intensities calculated by Howarth (2011). We find M " 20 M# for veq ∼ 600 km s−1 and Teff ! 38000 K. Only by adopting a smaller value for veq can we push the mass limit down, but even with veq ∼ 500 km s−1 the mass must exceed ∼17M#. 3.4. Luminosity From extant photometry (see Paper I), the (B-V) colour of VFTS102 is 0.35, implying an E(B-V) of 0.6 using colours calculated from our TLUSTY grid. Adopting a standard reddening law leads to a logarithmic luminosity (in solar units) of 5.0 dex, with an E(B-V) error of ±0.1 corresponding to an uncertainty of ±0.1 dex. However there are other possible sources of error, for example deviations from a standard reddening law and hence we have adopted a larger random error estimate of ±0.2 dex. 2The ratio of the equatorial angular velocity to that at which the centrifugal acceleration equals the gravitational acceleration. As VFTS102 is an Oe-type star, its intrinsic colours may be redder than predicted by our TLUSTY grid and indeed an infrared excess is found from published (de-reddened) 2MASS photometry. Inspection of a K-band VISTA image shows no evidence of contamination by nearby sources. Further evidence for circumstellar material is found in the strong Hα emission, which is double peaked as is the nearby He I line at 6678˚A, which supports our adoption of a sin i ∼ 1. Additionally there are weak double-peaked Fe II emission features (e.g. at 4233˚A), consistent with an Oe-type classification. Unfortunately our photometry and spectroscopy are not contemporaneous but if VFTS102 was in a high state when the optical photometry was taken, we may have overestimated the luminosity of the central star (see de Wit et al. 2006, for colour and magnitude variations of Be stars). 4. Past and future evolution Stellar evolution calculations for both single and binary stars are available in the literature (see Maeder & Meynet 2011). For very fast rotation, they suggest that rotational mixing is so efficient that stars may evolve quasi-chemically homogeneously (Maeder 1987; Woosley & Heger 2006; Cantiello et al. 2007; de Mink et al. 2009; Brott et al. 2011). However, with different physical assumptions, models do not evolve chemically homogeneously even for the fastest rotation rates (Cantiello et al. 2007; Ekstr¨om et al. 2008). 4.1. Single star evolution Fig. 2 illustrates evolutionary tracks for LMC single stars calculated using the methodology of Brott et al. (2011) for an initial equatorial rotational velocity of 600 km s−1, together with that for a more slowly rotating model. The former are evolving chemically homogeneously whilst the latter follows a ‘normal’ evolutionary path. Ekstr¨om et al. (2008) calculated models for a range of metallicities and masses between 3 and 60 M# but found that the stars followed normal evolutionary paths even for near critical rotational velocities. The estimated parameters of VFTS102 are consistent with our tracks for initial masses of ∼20-30 M#. Our models show a relatively rapid increase in the surface helium abundance due to their homogeneous evolution. For example the 25 M# model shows an enrichment of a factor of two after approximately 4 million years and when the effective temperature has increased to approximately 39000 K. By contrast the models of Ekstr¨om et al. (2008) show no significant helium abundance implying that an accurate helium abundance estimate for VFTS102 would help constrain the physical assumptions. –7– 4.2. Binary star evolution Below, we first discuss the environment of VFTS102 and then consider a possible evolutionary scenario. 4.2.1. A pulsar near VFTS102 VFTS102 lies in a complex environment near the open cluster NGC 2060. In particular it lies close to a young X-ray pulsar PSR J0537-6910 (Marshall et al. 1998) and the Crab-like supernova remnant B0538-691 (Micelotta et al. 2009). VFTS102 has an angular separation of approximately 0.8 arcminutes from PSR J0537-6910 implying a spatial separation (in the plane of the sky) of approximately 12 pc. The X-ray emission consists of a pulsed localised component and a more spatially diffuse component, with the latter providing the majority of the energy. The diffuse component was identified in ROSAT and ASCA observations by Wang & Gotthelf (1998a) and interpreted as coming from ram-pressure-confined material with the X-ray pulsar being identified soon afterwards by Marshall et al. (1998). Wang & Gotthelf (1998b) analysed ROSAT HRI observations and suggested that the emission could come from the remnants of a bow shock if the pulsar was moving with a velocity of ∼1000 km s−1. Wang et al. (2001) subsequently analysed higher spatial resolution CHANDRA observations, which clearly delineated this emission and implied that the pulsar was moving away from VFTS102. Fig. 3 superimposes these emission contours onto an HST optical image with VFTS102 being near the tail of these contours. As discussed by Wang et al. (2001) the spatial distribution of the diffuse X-ray emission and the SNR optical emission are well correlated. Differences probably arise from a foreground dark cloud and photoionization and mechanical energy input from the nearby open cluster. Timing measurements imply that the pulsar has a characteristic age of 5000 years (Marshall et al. 1998), consistent with the age estimate of Wang & Gotthelf (1998b) from analysis of X-ray emission. Spyrou & Stergioulas (2002) discuss the estimation of ages from spin rates and find the results to be sensitive to both the breaking index and the composition of the pulsar core. Indeed phase connected braking index measurements for young pulsars (see Zhang et al. 2001, and references therein) yield breaking indices lower than the n=3 normally adopted with corresponding increases in the characteristic ages. Additionally, Chu et al. (1992) found an age of approximately 24000 years from the kinematics of the supernova remnant. Adopting an age of 5000 years would imply that if these objects had been part of a binary system, their relative velocity (vs ) in the plane of the sky would be approximately 2500 km s−1. Increasing this age to 24000 years would then imply vs ∼ 500 km s−1. These values although large are consistent with a pulsar velocity of 1000 km s−1 in the model of Wang & Gotthelf (1998b) and of ∼600 km s−1 from the separation of the diffuse X-ray and radio emission (Wang et al. 2001). Additionally Hobbs et al. (2005) found a mean space velocity of approximately 400 km s−1 for a sample of young pulsars with velocities as high as 1600 km s−1. From the theoretical point of view, Stone (1982) found supernova kick velocities normally in excess of 300 km s−1, while more recently Eldridge et al. (2011) estimated kickvelocities for a single neutron star of more than 1000 km s−1with a mean value of ∼500 km s−1. 4.2.2. A binary evolution scenario for VFTS1 02 While the fast rotation of VFTS102 might be the result of the star formation process, it could also have arisen from spin-up due to mass transfer in a binary system (Packet 1981). A subsequent supernova explosion of the donor star could then lead to an anomalous radial velocity for VFTS102 (Blaauw 1961; Stone 1982). The nearby pulsar and supernova remnant make this an attractive scenario. Of course, we cannot eliminate other possible scenarios, e.g. dynamical ejection from a cluster (see Gvaramadze & Gualandris 2011) but it is unclear whether these could produce the very large rotational velocity of VFTS102. Cantiello et al. (2007) have modelled a binary system with initial masses of 15 and 16 M# adopting SMC metallicity. After mass transfer the primary exploded as a type Ib/c supernova. At that stage the secondary has a mass of approximately 21 M#, a rotational velocity close to critical and a logarithmic luminosity of approximately 4.9 dex (see Fig. 2 for its subsequent evolution). These properties closely match the estimates for VFTS102 summarized in Table 1. Based on grids of detailed binary evolutionary models (Wellstein et al. 2001; de Mink et al. 2007), the initial masses of the two components of such a binary system should be comparable, with M2/M1 " 0.7. If the initial mass of the secondary was in the range of 14-18 M#, that of the primary would need to be smaller than about 25 M#. This agrees with the estimated initial mass of the supernova progenitor based on the kinematics of the supernova remnant (Micelotta et al. 2009). In this scenario, it takes the primary star about 11 Myr to evolve to the supernova stage. While the most massive stars in 30 Doradus have ages of a few million years (Walborn et al. 1999), there is also evidence for different massive stellar populations with ages ranging up to about 10 Myr (Walborn & Blades 1997). Recently, De Marchi et al. (2011) have undertaken an extensive study of lower mass (!4 M#) main sequence and pre-main sequence stars in 30 Doradus. They obtain a median age of 12 Myr with ages of up 30 Myr. Hence it would appear possible that the putative binary system formed in the vicinity of 30 Doradus approximately 10 Myr ago and underwent an evolutionary history similar to that modelled by Cantiello et al. (2007). Proper motion information would be extremely valuable to further test this hypothesis. PSR J0537-6910 has not been definitely identified in other wavelength regions. Mignani et al. (2005) using ACS imaging from the Hubble Space telescope found two plausible identifications that would imply an optical luminosity similar to the Crab-like pulsars. A radio survey by Manchester et al. (2006) only yielded an upper limit to its luminosity consistent with other millisecond pulsars. However estimates for both components may be obtained from the HST proper motion study (Programme: 12499; PI: D.J. Lennon) that is currently underway. 4.3. Evolutionary future Irrespective of the origin of VFTS102, it is interesting to consider its likely fate. Stellar evolutionary models of rapidly rotating stars have recently been generated by Woosley & Heger (2006) and Yoon et al. (2006). The latter consider the fate of objects with rotational velocities up to the critical value (vc ). The evolution is shown to depend not only on initial mass and rotational velocity but also on the metallicity. In particular GRBs are predicted to occur only at sub-solar metallicities. Based on our single star models, VFTS102 has a rotational velocity above ∼ 0.8vc and is thus expected to evolve quasi-chemically homogeneously. While Yoon et al. (2006) and Woosley & Heger (2006) estimate the metallicity threshold for GRB formation from chemically homogeneous evolution to be somewhat below the LMC metallicity, the latter note its sensitivity to the mass loss rate (Vink & de Koter 2005). Indeed all our most rapidly rotating 20 − 30 M# models are evolving chemically homogeneously throughout core hydrogen burning (Fig. 2), a prerequisite to qualify for a GRB progenitor. In any case, within the context of homogeneous evolution VFTS102 is expected to form a rapidly rotating black hole, and a Type Ic hypernova. This conjecture remains the same within the binary scenario of Cantiello et al. (2007). Assuming a space velocity of 40 km s−1 for VFTS102 (compatible with its anomalous radial velocity), our evolutionary models imply that VFTS102 will travel ∼300-400 pc before ending its life. This is consistent with the finding of Hammer et al. (2006) that the locations of three nearby GRBs were found several hundred parsecs away from their most likely progenitor birth locations (see, however, Margutti et al. 2007; Wiersema et al. 2007; Han et al. 2010). 5. Conclusions VFTS102 has a projected rotational velocity far higher than those found in previous surveys of massive stars in the LMC, and indeed it would appear to qualify as the most rapidly rotating massive star yet identified. With a luminosity of 105 L# we estimate its current mass to be approximately 25 M#. Its extreme rotation, peculiar radial velocity, proximity to the X-ray pulsar PSR J0537-6910 and to a supernova remnant suggest that the star is the result of binary interaction. It is proposed that VFTS102 and the pulsar originated in a binary system with mass transfer spinning-up VFTS102 and the supernova explosion imparting radial velocity kicks to both components. If evolving chemically homogeneously, as suggested by recent models, VFTS102 could become a GRB or hypernova at the end of its life. Additionally it may provide a critical test case for chemically homogeneous evolution. SdM acknowledges NASA Hubble Fellowship grant HST-HF- 51270.01-A awarded by STScI, operated by AURA for NASA, contract NAS 5-26555. NM acknowledges support from the Bulgarian NSF (DO 02-85). We would like to thank Paul Quinn, Stephen Smartt, Jorick Vink and Nolan Walborn for useful discussions. This paper makes use of spectra obtained as part of the VLT-FLAMES Tarantula Survey (ESO programme 182.D-0222). Facilities VLT:Kueyen (FLAMES) Other Articles...... Dark Energy Multiness of Thoughts The Dream Mission Creation of Mind Loop Zombie Planets Proxima Centauri b TRAPPIST-1

Facts about Space Facts about space, new planets, antique thing in space, new updates The great attractor Location: The Great Attractor is located in the direction of the Centaurus and Hydra constellations, roughly 150 million light-years away from Earth. Its position behind the dust clouds of our Milky Way galaxy makes it challenging to observe directly. Gravitational Pull: The Great Attractor possesses an immense gravitational force that influences the motion of nearby galaxies. It acts as a massive attractor, causing galaxies to move towards it at high speeds. This gravitational pull shapes the large-scale structure of the universe. Uncertain Nature: The exact nature and composition of the Great Attractor remain a mystery. Scientists propose various theories, including the possibility of it being a concentration of dark matter or a supercluster of galaxies. Further research and observations are necessary to unravel the true nature of this cosmic phenomenon. Age of water A fascinating fact about the age of water on Earth is that some of the water molecules we have today are estimated to be as old as the solar system itself. This conclusion is based on the analysis of isotopes, specifically the ratios of deuterium (a heavy isotope of hydrogen) to regular hydrogen in water samples. By studying these isotopic ratios, scientists have determined that a portion of Earth's water has likely been part of the planet's hydrological cycle since its formation approximately 4.5 billion years ago. This means that the water we use and encounter every day has been cycling through the Earth's oceans, atmosphere, and land for billions of years, making it a remarkable and ancient resource. Gliese 436 B Classification: Gliese 436 b is classified as a "hot Neptune" due to its size resembling Neptune, but with extreme temperatures. Orbit and Distance: It orbits very close to its parent star, completing a revolution in just 2.64 Earth days. Gliese 436 b is located approximately 33 light-years away from Earth. Atmosphere and Composition: The planet has a scorching atmosphere due to its close proximity to the star. It is primarily composed of hydrogen and helium, but also contains exotic materials such as "hot ice" or superheated steam. Density and Structure: Gliese 436 b has a relatively low density compared to other exoplanets of similar mass and size. The planet may have a dense core surrounded by a massive envelope of hydrogen and helium. Tidal Forces: Strong tidal forces act on the planet due to its proximity to the star. These tidal forces elongate the planet, leading to additional heating of its atmosphere. The oldest planet Age: PSR B1620-26 system is estimated to be around 12.7 billion years old. Star: The system's central star is a binary system consisting of a pulsar (PSR B1620-26) and a white dwarf. Planets: PSR B1620-26 b (Methuselah): Discovered in 2003. Gas giant planet. Similar in size to Jupiter. Mass is approximately 2.5 times that of Jupiter. Orbits both the pulsar and the white dwarf. Average distance from the star: about 23 astronomical units (AU). Highly eccentric orbit. Orbital period: roughly 100 Earth years. PSR B1620-26 c (Genesis): Discovered in 2006. Gas giant planet. Orbits at a distance of approximately 83 AU from the central stars. GJ 1214B Discovery: GJ 1214b was discovered in 2009 by the MEarth Project, which aims to detect Earth-sized exoplanets orbiting nearby M-dwarf stars. Classification: GJ 1214b is classified as a super-Earth exoplanet. Size and Mass: GJ 1214b is larger than Earth but smaller than gas giants like Jupiter. Its size is approximately 2.7 times the Earth's radius. The mass of GJ 1214b is estimated to be around 6.5 times the mass of Earth. Composition: GJ 1214b is believed to have a substantial atmosphere. The planet's composition consists of a combination of rock and water. HD 140283 Age: HD 140283 is one of the oldest known stars in the universe. Its estimated age is about 14.46 billion years, making it older than the estimated age of the universe itself. Distance: HD 140283 is located approximately 190 light-years away from Earth. It is situated in the constellation Libra. Spectral Class and Subgiant Status: HD 140283 is classified as a subgiant star. It belongs to the spectral class F9, indicating its temperature and other Speciality: This planet is the oldest planet of our universe, in fact this planet is older than universe Deja Vu effect Deja vu is a psychological phenomenon characterized by a strong sense of familiarity or the feeling that one has experienced a current situation or event before, despite knowing that it is impossible. While the exact cause of deja vu is not fully understood, several theories have been proposed to explain its occurrence. Here are some of the leading theories: Prevalence: Deja vu is a common phenomenon experienced by a significant portion of the population. Studies suggest that approximately 60-80% of people report having had at least one deja vu experience in their lifetime. Milkey way galaxy The Milky Way Galaxy was born about 12.7 years ago, and is still expanding rapidly today. According to scientists, 6 to 7 new stars are born every year in our milky way galaxy and every year a light star dies and turns into a planetary nebula. Our solar system is 27,000 light years away from the center of the Milky Way galaxy. Our milky way galaxy travels through space at a speed of about 583 KM/S, and it is expanding at a speed of 1770 KM/H. At the center of our Milky Way galaxy is the SAGITTARIUS A* black hole with a mass 4.3 million times that of our Sun. Speed of Light The speed of light in a vacuum is approximately 299,792,458 meters per second (or about 186,282 miles per second). This speed is denoted by the symbol "c" in physics equations. Light travels at a constant speed in a vacuum, regardless of the source or the observer's motion. This is one of the fundamental principles of physics. The speed of light is incredibly fast. For example, light from the Sun takes about 8 minutes and 20 seconds to reach Earth, even though the distance is about 93 million miles (150 million kilometers). The speed of light is the fastest known speed in the universe. According to our current understanding of physics, no object with mass can reach or exceed the speed of light. Travel at speed of light If we travel at the speed of light, what will the universe look like, then understand that when we drive in the rain, the rain water hits the windshield of the car, as the speed of the car increases, the water hits more diagonally and today The concept applies to spaceships and interstellar space in the universe, where the spaceship traveling at the speed of the universe appears in 2D form in a frame against the light of the surrounding stars. MIT University has done one such fun experiment in which it has shown what it feels like to go back and forth at the speed of light. (Download link is below) Click here to experience Slower Speed of Light game Speed of Light 2 The fastest moving thing in our universe is light, which moves at a speed of 300,000 kilometers per second. You will be surprised to know that light takes 1.3 seconds to reach the moon from earth and it takes 182 seconds to reach Mars and it takes 32 minutes to reach Jupiter and it takes 500 years to reach our Milky Way Galaxy. Light takes 2500000 years to go and reach the nearest Galaxy Andromeda and you will be surprised to hear that despite the speed of light, it can never cross the universe because our universe is spreading faster than light. Time Dilation What is time dilation? Let us understand in a very simplified way, you must have seen the Interstellar movie, in which time is extremely slow on the planet named Millers, where 1 hour spent is equal to 7 years spent on Earth. This is because the planet was very close to the black hole, according to Einstein's theory of relativity, black holes have more time warp, so that time slows down. So understand it in this way that it normally takes us time to go from point A to B, but if we pass near a black hole, then the curvature increases, so it takes more time for us to go from A to B. Epsilon Eridani Star System 7th Aug 2000 Scientists have discovered a new star system named Epsilon Eridani in the Eridanus constellation about 10.5 light years away from Earth. This star system is exactly like our solar system. In this star system we have discovered Epsilon Eridani-b and a low mass planet Epsilon Eridani-c like Jupiter. Apart from this, the asteroid belt is also present in this star system just like our solar system. About 800 million years old, this star system is similar to the time when life began on our Earth. Scientists also consider this star system as the home of aliens. Strange Planets The Pink Planet : GJ504B is a planet that looks completely pink in color and the reason for the pink appearance of this house is its intense heat which makes it look pink, and this planet is 4 times bigger than Jupiter. Super Saturn : J1407B is also called Super Saturn because this planet has the largest planetary ring system ever found and this ring system is 640 times bigger than Saturn. The golden planet : 16 psyche is an asteroid, but it is also called a minor planet. There is a lot of gold in this asteroid. Let us tell you that the price of this minor planet is about 700 quintillion dollars. Space Facts-1 Right now we know only 5% of the universe out of 100 hubs and this is what we call the observable universe and according to scientists there are about 2 trillion galaxies in our observable universe. 1 billion 400 million years ago, a day on our earth used to be 18 hours 41 minutes. There are thousands of millions of black holes present in our Milky Way Galaxy, which keep wandering in space like this. HD140283 is considered to be the first star of this universe and the age of this star is 14.3 billion years which is more than the age of our universe. The black hole that is closest to our earth is named HR6819 and this black hole is 1000 light years away from us. PSR J1719 1438B In the year 2009, MATHEW BAILES, who is an astrophysicist, saw a house from his telescope which was 3000 times bigger than the sun, yet it was revolving around its sun, then after research, it was found that in a supernova explosion, that star was transformed into a nevtron star, whose mass is much more than its house, so it is holding its star despite being small, and that planet has also become a super giant, but due to the heat of its star. Since then the carbon inside it has now become diamond and that planet is a complete diamond planet. Center of Mass in Solar System We all have been reading since childhood that all the planets in our solar system revolve around the Sun, so according to that, the middle point for all the planets should be the middle point of the Sun, but it is not so in reality. Gravitational force pulls the planet towards itself, similarly the planets also pull the Sun, but here the Sun is an ancient and very big star, so its force is more than all the other planets, hence all the planets are seen revolving around it, but all the planets And the center of mass between the Sun is different, like Jupiter is the largest planet in our solar system, so as soon as its gravitational force and the force of the Sun meet, both of them revolve around their center of mass which is away from the center of the Sun. Comes a little further. Time Traveler Party The great scientist Stephen Hawking was already experimenting on time travel. In 2009, Stephen Hawking hosted a reception for time travelers at the University of Cambridge. He sent out invitations but did not publicize the event until afterward. The idea was to see if any time travelers would attend, as they would be aware of the event's details through time-traveling knowledge. But no one attended that party which proved that humans cannot time travel. And we also know that if we have to go back in time then it is never possible in the universe. What is Time? Time!, what is time? You will say that a clock or a calendar will be something like this, no, time is not a thing, all these are things to measure time. Time is a dimension, I understand in simple language, time has been moving ever since our universe was created, so is time moving us? No, things keep changing with time, meaning motion also keeps on changing with time, see like ever since the universe was created, it is expanding and all this is happening with time. Before the Big Bang, there was no motion in the singularity, so there was no time then, it can be said as if only time can be the cause of change. Times are changing. Why we should not make contact with aliens right now Great scientist Stephen Hawking said that we should not make contact with aliens right now. Why did he give such advice? Because we humans are still like small children in the world of technology, you will say that science has progressed so much, so many discoveries have been made, we have even gone to space, once or twice in space. We do not become rich by leaving, we have not even searched for living on another planet or have gone to live on any other planet. This progress seems big to us but it is nothing. If we contact any alien civilization, they will reach our Earth and may even harm us, that is why even today we do not respond to any signal. Quantum Elevator What is a quantum elevator? Suppose you are in a building and each floor of this building is a different dimension, you live on the 4th floor, that is, in the 4th dimension, and you have to go from the 4th floor to the 10th floor and there is an elevator here which will take you there. But when you are going from 4th floor to 10th floor then you will not be able to see the floors coming in between and you will not even know what is on this floor. This is how the quantum elevator works. And this can be very different in different dimensions, it takes us in a fixed dimension. Bennu Asteroid Composition: Bennu is a carbonaceous asteroid, rich in carbon-based compounds. This composition makes it valuable for scientists, as it could provide insights into the origin of life and the early solar system. Sample Collection: NASA's OSIRIS-REx mission successfully collected a sample from Bennu's surface in October 2020. This mission aims to return the collected samples to Earth, allowing scientists to study the asteroid's material in detail. Impact Risk: Bennu is classified as a potentially hazardous asteroid due to its orbit's proximity to Earth's orbit. Scientists continue to monitor its trajectory to assess any potential impact risks in the future. Images Voyager's Golden Record The Voyager Golden Record, a time capsule of humanity's cultural and scientific achievements, was launched aboard the Voyager 1 and Voyager 2 spacecraft by NASA in 1977. This phonograph record contains a diverse array of sounds and images representing Earth and its inhabitants, including greetings in 55 languages, music from various cultures, and images depicting life on our planet. The record was designed to serve as a message to any extraterrestrial civilizations that might encounter the Voyager spacecraft. A testament to human curiosity and creativity, the Voyager Golden Record remains a symbolic representation of our species' desire to reach out and connect with the unknown, even across the vastness of space. Gallery WARP Drive Warp drive is a theoretical propulsion system that features prominently in science fiction, notably in franchises like "Star Trek." The concept involves manipulating space-time to enable faster-than-light travel, allowing spacecraft to travel vast interstellar distances in a relatively short time. In essence, warp drive contracts space in front of the spacecraft while expanding it behind, creating a warp bubble that moves the vessel. While widely popularized, especially by theoretical physicist Miguel Alcubierre's theoretical framework in 1994, practical implementation remains a distant dream due to the enormous energy requirements and unresolved challenges in bending space-time as proposed. Scientists continue to explore the theoretical underpinnings of warp drive, but as of now, it remains firmly in the realm of speculative science fiction. Psyche Asteroid Psyche is a massive asteroid located in the asteroid belt between Mars and Jupiter. It's of particular interest to scientists because it's composed mostly of metallic iron and nickel, resembling Earth's core. This unique composition has led researchers to hypothesize that Psyche might be the exposed core of an early planetesimal, offering a rare opportunity to study the interior of a planet-like body. NASA's Psyche spacecraft, slated for launch in 2022, aims to explore this intriguing asteroid, providing valuable insights into the processes that shaped the early solar system and potentially uncovering secrets about planetary core formation. Earendel Star The James Webb Space Telescope has discovered the most distant star in space, which is believed to be the most distant star ever explored, and it is also believed that this star was formed only in the first 100 million years after the Big Bang. had gone Arandale was discovered by the Hubble Space Telescope in 2002 and along with its expansion, it has moved 2800 kilometers away from us. Recently, NASA has once again discovered this star with the help of James Webb Telescope and it has been revealed that it is 2 times bigger than our sun, its brightness is 1 million times more than our sun. NGC 6166 Black Hole Psyche is a massive asteroid located in the asteroid belt between Mars and Jupiter. It's of particular interest to scientists because it's composed mostly of metallic iron and nickel, resembling Earth's core. This unique composition has led researchers to hypothesize that Psyche might be the exposed core of an early planetesimal, offering a rare opportunity to study the interior of a planet-like body. NASA's Psyche spacecraft, slated for launch in 2022, aims to explore this intriguing asteroid, providing valuable insights into the processes that shaped the early solar system and potentially uncovering secrets about planetary core formation.

Time Line

Dark Energy In the late 1990s, astronomers found evidence that the expansion of the universe was not slowing down due to gravity as expected. Instead, the expansion speed was increasing. Something had to be powering this accelerating universe and, in part due to its unknown nature, this “something” was called dark energy. What Is Dark Energy? In the late 1990s, astronomers found evidence that the expansion of the universe was not slowing down due to gravity as expected. Instead, the expansion speed was increasing. Something had to be powering this accelerating universe and, in part due to its unknown nature, this “something” was called dark energy. Hubble plays an important role in verifying, characterizing and constraining dark energy. Both Hubble and ground-based observations measures a special type of stellar explosion, a white dwarf supernova, to measure accurate distances to galaxies. A galaxy located a billion light-years away provides a data point for the universe as it was a billion years ago. Meanwhile, as the universe expands, the light traveling to Earth from distant galaxies (and their supernovas) is stretched out to longer wavelengths — a phenomenon called cosmological redshift. The cosmological redshifts of galaxies at different distances provides a history of the expansion of the universe over time. However, only Hubble had the resolution to extend these observations to very distant galaxies. The discovery of supernova 1997ff, located about 10 billion light-years away, provided evidence for dark energy. About halfway into the universe’s history — several billion years ago — dark energy became dominant and the expansion accelerated. While ground-based studies had measured this accelerating period, Hubble’s observation of 1997ff stretched back to the decelerating part of the expansion. This shift between two different eras of the universe — a change from a decelerating universe to an accelerating universe — showed that dark energy exists. Hubble continued to explore the nature of dark energy with observations such as the Great Observatories Origins Deep Survey (GOODS), structured to help uncover distant supernovas. The 42 supernovas found by Hubble not only solidified the conclusions about dark energy, but also began to constrain some of its possible explanations. Later Hubble results identified how early in the universe dark energy began to influence the expansion as well as constrained the current expansion rate. The view that emerged was that dark energy was consistent with the slow, steady force of Einstein’s cosmological constant, a concept that the physicist had initially introduced into his equations to prevent his theoretical universe from collapsing, then later retracted when the expansion of the universe was discovered. But instead of holding the universe in a steady state, dark energy is pushing outward to expand the universe faster and faster. The discovery of dark energy was recognized by the Nobel Prize in Physics in 2011. Astronomers now know that there is much more to the universe than meets the eye. The luminous and non-luminous normal matter makes up about 4 percent of the total mass and energy density of the universe. Dark matter, which emits no light and cannot be directly observed, comprises another 24 percent of the total, while dark energy dominates with about 72 percent. Most of the universe is unknown and only indirectly detected. We can see its effects on galaxies and the expansion of the universe, but we have yet to identify the underlying source. That may seem unsettling, but to a scientist, it is exciting. There are more great mysteries to explore and solve! The universe is expanding, and that expansion stretches light traveling through space in a phenomenon known as cosmological redshift. The greater the redshift, the greater the distance the light has traveled. Within the Hubble Deep Field-North region, astronomers pinpointed a blaze of light from one of the farthest supernovas ever seen. In a close-up view of that region (left) a white arrow points to a faint elliptical, the home of the exploding SN 1997ff. The supernova itself (right) is distinguished by the white dot in the center. This diagram reveals changes in the rate of expansion since the universe's birth 15 billion years ago. The more shallow the curve, the faster the rate of expansion. The curve changes noticeably about 7.5 billion years ago, when objects in the universe began flying apart as a faster rate. Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart. This image is a portion of the GOODS-North field. The field features approximately 15,000 galaxies, about 12,000 of which are forming stars. Hubble’s ultraviolet vision opened a new window on the evolving universe, tracking the birth of stars over the last 11 billion years back to the cosmos’ busiest star-forming period about 3 billion years after the big bang. Spiral galaxy NGC 3021 (background) was one of several hosts of Type Ia supernovae observed by astronomers to refine the measure of the universe's expansion rate, called the Hubble constant. Hubble made precise measurements of Cepheid variable stars in the galaxy, highlighted by green circles in the inset boxes. Other Articles...... Zombie Planets Multiness of Thoughts The Dream Mission Creation of Mind Loop STAR VFTS102 KEPLER-186f Proxima Centauri b TRAPPIST-1

KEPLER-186f Kepler-186f is an Earth-sized exoplanet located 500 light-years away in the constellation Cygnus. It orbits a red dwarf star, Kepler-186, within its habitable zone, where conditions might allow liquid water to exist. This discovery sparked interest in the search for potentially habitable exoplanets and raised questions about the possibility of extraterrestrial life beyond our solar system. However, limited data about its atmosphere and surface make it challenging to assess its true habitability. 1. Characteristics of Kepler-186f: Size: Kepler-186f is considered an Earth-sized exoplanet, with an estimated radius about 1.1 times that of Earth. This makes it one of the few exoplanets discovered at the time that was close in size to our own planet. Parent Star: Kepler-186f orbits a red dwarf star known as Kepler-186, which is cooler and smaller than our Sun. Kepler-186 is classified as an M-dwarf star. Orbit: Kepler-186f is in a relatively tight orbit around its host star, completing one orbit approximately every 130 Earth days. It receives about a third of the energy from its star compared to Earth's energy from the Sun. Habitable Zone: One of the most intriguing aspects of Kepler-186f is its location within the habitable zone (Goldilocks zone) of its star. The habitable zone is the region around a star where conditions might be suitable for liquid water to exist on the planet's surface, which is a key factor for the potential development of life as we know it. 2. Atmosphere of Kepler-186f: Information about the specific composition and characteristics of Kepler-186f's atmosphere is not currently known. Detecting and analyzing the atmospheres of exoplanets, especially those as distant as Kepler-186f, is a challenging task that often requires advanced telescopes and instruments. Detailed studies of an exoplanet's atmosphere can provide important insights into its potential habitability. 3. Potential for Extraterrestrial Life: Kepler-186f's location within the habitable zone of its star makes it an intriguing candidate for the potential existence of extraterrestrial life. The habitable zone represents the region where conditions might be right for liquid water to exist on the planet's surface, which is a crucial ingredient for life as we know it. However, the presence of liquid water alone does not guarantee the existence of life. Other factors, such as the composition of the planet's atmosphere, the presence of essential nutrients, geological activity, and the stability of the climate, also play vital roles in determining habitability. Detecting signs of life on Kepler-186f or any exoplanet is extremely challenging and would likely require advanced telescopes capable of analyzing the planet's atmosphere for biomarkers (e.g., oxygen, methane) or other potential signs of biological activity. Kepler-186f and Earth have some similarities, such as their Earth-sized classification and the fact that Kepler-186f is located within the habitable zone of its star. However, they also have several key differences. Here's a comparison between Kepler-186f and Earth: 1. Size and Mass: Earth: Earth is approximately 12,742 kilometers (7,918 miles) in diameter and has a mass of about 5.972 × 10^24 kilograms. Kepler-186f: Kepler-186f is considered an Earth-sized exoplanet, with an estimated radius about 1.1 times that of Earth. Its exact mass is not precisely known but is believed to be greater than Earth. 2. Parent Star and Orbit: Earth: Earth orbits the Sun, a G-type main-sequence star (G2V), at an average distance of about 149.6 million kilometers (93 million miles). It completes one orbit around the Sun in approximately 365.25 days. Kepler-186f: Kepler-186f orbits a red dwarf star known as Kepler-186, which is cooler and smaller than our Sun. Its orbit around Kepler-186 takes approximately 130 Earth days. 3. Habitable Zone: Earth: Earth is located within the habitable zone of the Sun, where conditions for liquid water are ideal for the existence of life. Kepler-186f: Kepler-186f is also located within the habitable zone of its star, Kepler-186. This means that, theoretically, it could have conditions suitable for liquid water to exist on its surface. 4. Atmosphere: Earth: Earth has a diverse and life-sustaining atmosphere composed primarily of nitrogen (about 78%) and oxygen (about 21%), with trace amounts of other gases. The atmosphere plays a critical role in regulating temperature and supporting life. Kepler-186f: The specific composition and characteristics of Kepler-186f's atmosphere are not currently known. Detailed studies are needed to determine the presence and properties of its atmosphere. 5. Surface Conditions: Earth: Earth has a variety of surface conditions, including continents, oceans, and various climate zones. It supports a wide range of life forms and ecosystems. Kepler-186f: The specific surface conditions of Kepler-186f, such as the presence of oceans, continents, or any geological activity, are not known due to limited observational data. 6. Potential for Extraterrestrial Life: Earth: Earth is known to host a diverse array of life, from microorganisms to complex multicellular organisms, including humans. Kepler-186f: While it is located within the habitable zone and is considered an interesting candidate for further study, the presence of extraterrestrial life on Kepler-186f is purely speculative at this point. It is one of the exoplanets that has garnered attention for its potential habitability. Other Articles...... Dark Energy Multiness of Thoughts The Dream Mission Creation of Mind Loop STAR VFTS102 KEPLER-452b Proxima Centauri b TRAPPIST-1

Courses Associated and published by Aim with A.M Silver Package To connect this element to content from your collection, select the element and click Connect to Data. Price 999/- Read More Gold Package To connect this element to content from your collection, select the element and click Connect to Data. Price 1999/- Read More Diamond Package To connect this element to content from your collection, select the element and click Connect to Data. Price 3999/- Read More Platinum Package To connect this element to content from your collection, select the element and click Connect to Data. Price 7999/- Read More

Existence of Multiverse Overview what is multiverse? , Does it exist in real?, and if yes then how, I will also show its proof and an experiment. In this article, you will know the secret of the multiverse and all the facts related to it and will also know whether it exists or not. 1.1 Imaginary view of multiverse Perspective.... We already know about the multiverse that this is our universe and there must be another such universe outside this universe and we have named it multiverse, but can't it be that when the Big Bang happened, different universes were created? It must have happened, it must be strange to hear but I will explain it to you very well. You must have read in Science in class 8-9 that when milk is heated, the particles below its surface get heated and come up and the cold particles from above come down and in the same way the milk gets heated, but this one feels hotter. After this, its hot molecules come up through an air bubble, which takes time and the milk gets heated quickly, so what is the relation of this to our theory?, like the milk particles get heated more and form a bubble type structure. Similarly, when the Big Bang happened, the particles were spread among the molecules, then that energy would also have taken a bubble-like form and we live in one of those bubble type structures. 1.2 Bubble type structure in milk Where is proof?..... 1.3 Experience of deja vu. By now you must have understood all the society but still there must be a question somewhere in your mind that proving the multiverse only on the medium of milk does not seem confidential. Yes, so now I will tell you some experiments and proofs, imagine that you are looking at the Taj Mahal and suddenly this thought came to you that yes, I have already seen the Taj Mahal and that too while standing at the same place, or Sometimes it may have happened that you are meeting someone for the first time and you feel that you have met them before, 94% of the people in the whole world have felt such things, this is called déjà vu effect, it means first. Some work done The thesis behind this is that when your timeline collides with your avatar, which is in another universe of the multiverse, then you feel that your other avatar has done this thing earlier and that thing is saved in your memory. It happens and when you see that thing again, you feel that you have done it before. We can compare this thing with the multiverse, and somewhere this thing may have a connection with the multiverse.

Unique design with unique concept. Rocking Cave What we did? For Navratri, we have created a theme based decoration at home which has the concept of a cave and we have made it much better. Its name is Rokking Cave. We have built this entire structure from newspaper and cardboard, it took us about 20 days to build it. We have designed a hut near the temple and have also made the gate look like a hut by using type of grass. We have completed this entire project with a lot of hard work. And all the devotees coming for darshan will also get a unique gift. Come and enjoy this amazing view. Contributors SK Homebackers Cake and all bakery items, resin art, craft & fashion hub Contact us Our Bests

Chandrayaan-3: India's Next Lunar Odyssey India has made remarkable strides in space exploration over the past few decades, and one of its most ambitious projects is the Chandrayaan series. Following the success of Chandrayaan-1 and Chandrayaan-2, the Indian Space Research Organisation (ISRO) is gearing up for the next mission in this lunar exploration series - Chandrayaan-3. This article explores the history, objectives, budget, and significance of Chandrayaan-3. Introduction India has made remarkable strides in space exploration over the past few decades, and one of its most ambitious projects is the Chandrayaan series. Following the success of Chandrayaan-1 and Chandrayaan-2, the Indian Space Research Organisation (ISRO) is gearing up for the next mission in this lunar exploration series - Chandrayaan-3. This article explores the history, objectives, budget, and significance of Chandrayaan-3. History of Chandrayan Missions Chandrayaan-1, India's maiden lunar mission, was launched in October 2008. It made significant contributions to lunar science by discovering water molecules on the moon's surface and mapping its topography. Despite a shorter-than-expected mission life, Chandrayaan-1 marked a monumental achievement for ISRO. Chandrayaan-2, launched in July 2019, was India's second lunar exploration mission and aimed to further our understanding of the moon. It included an orbiter, a lander (Vikram), and a rover (Pragyan). While the lander failed to make a soft landing, the orbiter continues to provide valuable data about the moon. Chandrayaan-3: The Next Frontier Chandrayaan-3 is the much-anticipated follow-up mission in India's lunar exploration program. The primary objective of Chandrayaan-3 is to successfully land a rover on the moon's surface, building upon the experience and technology developed during Chandrayaan-2. Key Objectives of Chandrayaan-3: Lunar Surface Exploration: Chandrayaan-3 will carry a rover to explore the moon's surface, collecting valuable data about its geology, mineral composition, and topography. Scientific Research: The rover will conduct scientific experiments to enhance our understanding of the moon's history and evolution, helping unravel mysteries about our closest celestial neighbor. International Collaboration: ISRO plans to collaborate with international space agencies and institutions, facilitating the exchange of knowledge and expertise in lunar science and exploration. Budget and Funding The budget for Chandrayaan-3 is estimated to be around $200 million, making it a cost-effective lunar mission compared to many other international counterparts. ISRO has a track record of delivering successful missions within budget constraints, showcasing its efficient use of resources. Challenges and Preparations Landing on the moon is no small feat, and ISRO is well aware of the challenges that lie ahead. Learning from the lessons of Chandrayaan-2, ISRO has undertaken extensive preparations, including rigorous testing and simulation exercises, to ensure the successful soft landing of the rover. The recent advancements in technology and lessons learned from previous missions are expected to enhance the chances of success for Chandrayaan-3. ISRO's commitment to perfection and determination to push the boundaries of space exploration remain unwavering. Significance of Chandrayaan-3 Chandrayaan-3 holds immense significance for India and the global scientific community: Advancing Lunar Exploration: Successful implementation of Chandrayaan-3 will demonstrate India's capabilities in lunar exploration, strengthening its position in the global space community. Scientific Discoveries: The data collected by the rover will contribute to a deeper understanding of the moon's geological history and may provide insights into the broader processes of planetary evolution. International Collaboration: Collaborative efforts with other space agencies foster knowledge exchange, making Chandrayaan-3 a collaborative effort for the betterment of scientific understanding. Conclusion Chandrayaan-3 represents another significant step in India's journey of space exploration, building upon the successes and experiences of previous missions. With its budget-conscious approach, ISRO aims to prove once again that cutting-edge science and technology can be achieved efficiently. As we eagerly await the launch of Chandrayaan-3, the world looks forward to the scientific discoveries and advancements that it will undoubtedly bring to the field of lunar exploration. Chat Section If you have any question ask me here.... Other Articles...... Dark Energy Multiness of Thoughts The Dream Mission Zombie Planets Creation of Mind Loop STAR VFTS102 KEPLER-186f Proxima Centauri b TRAPPIST-1

Age of our Universe Coming Soon.......

Time Line