We look at the most weird and wonderful exoplanets discovered in 2021

From a ‘Hot Jupiterwith an unusually quick orbit of just 3.2 DAYS to a rocky ‘Super Earththat could host aliens: The most weird and wonderful exoplanets discovered in 2021

  • Astronomers have been hunting for exoplanets since the first was found in 1992
  • As equipment gets more advanced and sharp, they can discover smaller planets
  • The hope is to one day find a world similar to Earth in size, with an atmosphere
  • In the past year alone hundreds of worlds have been found orbiting distant stars
  • They range from hot Jupiters with iron atmospheres, to ‘Super-Earth’ 세계
  • Astronomers have discovered dozens of previously unknown exoplanets orbiting distant stars, including hot Jupiter planets and ‘Super Earths’.

    Among the worlds discovered this year are a huge exoplanet in orbit around one of the most massive and hottest two-star system ever seen.

    Researchers also found multiple rocky worlds within the habitable zone of star systems, where it could be possible life has evolved.

    MailOnline compiled a selection of some of the most interesting, strange and unexpected exoplanet discoveries of the past 12 개월.

    Astronomers have discovered dozens of previously unknown exoplanets orbiting distant stars, including hot Jupiter planets and 'Super Earths'

    Astronomers have discovered dozens of previously unknown exoplanets orbiting distant stars, including hot Jupiter planets and ‘Super Earths

    These discoveries were made with the current generation of ground and space-based observatories, although future telescopes, including the James Webb Space Telescope, will be able to see their atmospheres in more detail.

    Gliese 486b: A Super-Earth that could host ALIEN life

    A ‘super-Earthexoplanet with a surface temperature slightly cooler than Venus may have an atmosphere able to host alien life, according to a new study.

    Astronomers from the Max-Planck Institute used different methods of observation to discover the alien world orbiting a nearby red dwarf dwarf star 26 light years away.

    Scientists discover new rocky 'Super-Earth' planet called Gliese 486b that could host ALIEN life

    Scientists discover new rocky ‘Super-Earthplanet called Gliese 486b that could host ALIEN life

    GLIESE 486b: A HOT TERRESTRIAL WORLD

    Radius: 1.305 times the Earth

    Mass: 2.82 times the Earth

    Orbital period: 1.46 일

    Host star type: Red dwarf

    Temperature: 426 degrees C

    Distance: 26 광년

    광고

    Gliese 486b is the only planet so far detected orbiting the small star and has a radius 1.3 times larger than the Earth but is 2.8 times more massive.

    The planet has an iron-silicate composition similar to the makeup of Earth but is much hotter, with a surface temperature of 428 섭씨 온도, 팀이 말했다.

    To determine whether the planet still has an atmosphere or is habitable and so suitable for life, astronomers say further studies will be needed in future.

    The alien world isn’t hot enough to become a lava planet, where the atmosphere is stripped and molten rock runs across much of its surface, but it is expected to still have flowing lava.

    This prompted astronomers to consider the possibility that it may have an atmosphere and could possibly be suitable for life.

    They didn’t explain what type of life was likely to live on such a hot planet.

    b Centauri b: A massive exoplanet orbiting a giant two-star system

    A giant planet has been spotted orbiting the hottest and most massive two-star system found to date and scientists are baffled because such a world should not exist.

    The exoplanet is moving around b Centauri, located 325 지구에서 광년, which has mass at least six times that of Earth’s sun.

    The newly found planet, known as b Centauri b, has also been found to orbit the star system at 100 distance Jupiter orbits the sun, which scientists say could be the key to its survival

    The newly found planet, known as b Centauri b, has also been found to orbit the star system at 100 distance Jupiter orbits the sun, which scientists say could be the key to its survival

    지금까지, no planets had been spotted around a star more than three times as massive as our sun.

    The newly found planet, known as b Centauri b, has also been found to orbit the star system at 100 distance Jupiter orbits the sun, which scientists say could be the key to its survival.

    Markus Janson, an astronomer at Stockholm University in Sweden and lead author of the study, 에서 말했다 성명서: ‘Finding a planet around b Centauri was very exciting, since it completely changes the picture about massive stars as planet hosts.

    Janson and his colleagues spotted b Cen b with the Spectro-Polarimetric High-contrast Exoplanet Research instrument (SPHERE) mounted on the European Southern Observatory’s Very Large Telescope (ESO’s VLT) in Chile, 3 월 20, 2019 and then again on April 10, 2021.

    A high-contrast imaging technique was used to detect the planet, allowing scientists to distinguish between the faint light coming from the planet and the very bright light emitted from the star system.

    ‘Our results show that planets can reside in much more massive stellar systems than what would be expected from extrapolation of previous results,’ 에 발표된 연구를 읽고 자연.

    GJ 367b: A planet the size of Mars but with the makeup of Mercury

    Astronomers have discovered an ultra-light exoplanet about 31 light years away that orbits its star in just eight hours.

    The planet, GJ 367 비, 있다 55 per cent the mass of Earth, making it one of the lightest planets discovered to date, researchers at 매사추세츠 주 Institute of Technology (MIT) and the German Aerospace Center reveal.

    Astronomers have discovered an ultra-light exoplanet about 31 light years away that orbits its star in just eight hours

    Astronomers have discovered an ultra-light exoplanet about 31 light years away that orbits its star in just eight hours

    THE HABITABLE ZONE

    The habitable zone is the range of orbits around a star in which a planet can support liquid water.

    The temperature from the star needs to be ‘just rightso that liquid water can exist on the surface.

    The boundaries of the habitable zone are critical.

    If a planet is too close to its star, it will experience a runaway greenhouse gas effect, like Venus.

    But if it’s too far, any water will freeze, as is seen on Mars.

    Since the concept was first presented in 1953, many stars have been shown to have a habitable area, and some of them have one or several planets in this zone, like ‘Kepler-186f’, discovered in 2014.

    광고

    With a diameter of 5,560 마일, GJ 367 b is slightly bigger than Mars (4,200 마일) but has the makeup of Mercury.

    The exoplanet is likely rocky but with no lifeforms as it’s exposed to an ‘enormousamount of radiation, due to its small distance to its star – about 620,000 마일 (1km).

    For comparison, Mercury’s average distance from our Sun is 36 million miles.

    GJ 367 b is the only known planet orbiting its parent star, but the astronomers think there are more to be discovered in this particular system.

    GJ 367 b is an ultra-short-period (USP) planet – a type of exoplanet with orbital period less than one day,

    GJ 367 b is close enough that researchers could pin down properties of the planet that were not possible with previously detected USPs.

    예를 들어, the team determined that GJ 376 b is a rocky planet and likely contains a solid core of iron and nickel, similar to Mercury’s interior.

    Due to its extreme proximity to its star, the astronomers estimate GJ 376 b is blasted with 500 times more radiation than what the Earth receives from the sun.

    결과적으로, the planet’s dayside boils at up to 2,700°F (1,500°C). At such temperatures, iron and rocks melt and any substantial atmosphere would have long vaporised away, along with any signs of life as we know it.

    하나, there’s still a chance of life elsewhere in this particular system, the MIT authors believe.

    TOI-2109b: ‘Ultrahot Jupiterexoplanet

    An ‘ultrahot Jupiterexoplanet has been discovered with blistering surface temperatures of 6,000°F.

    The planet, dubbed TOI-2109b, also has an unusually short orbit of just 16 hours – the shortest of any known gas giant yet.

    The planet, dubbed TOI-2109b, also has an unusually short orbit of just 16 hours – the shortest of any known gas giant yet

    The planet, dubbed TOI-2109b, also has an unusually short orbit of just 16 hours – the shortest of any known gas giant yet

    TOI-2109ban ‘ultrahot Jupiterexoplanet

    Temperature: 6,000°F

    Mass: Five times more massive than Jupiter

    크기: 35% larger than Jupiter

    Distance from star: 1.5 million miles

    Length of year: 16 시간

    광고

    For comparison, Jupiter takes 12 years to complete a full orbit around the sun!

    Researchers from MIT hope that its discovery could help to unravel the mystery of how hot Jupiter exoplanets come to be in the first place.

    ‘From the beginning of exoplanetary science, hot Jupiters have been seen as oddballs,’ said Avi Shporer, 연구의 공동 저자.

    ‘How does a planet as massive and large as Jupiter reach an orbit that is only a few days long? We don’t have anything like this in our solar system, and we see this as an opportunity to study them and help explain their existence.

    The researchers discovered TOI-2109b 855 light years from Earth, using NASA’s Transiting Exoplanet Survey Satellite (TESS).

    Due to its extremely tight orbit and proximity to its star, the planet’s day side is estimated to be at around 3,500 Kelvin, or close to 6,000 화씨.

    This makes it the second hottest detected so far, according to the researchers.

    ‘Meanwhile, the planet’s night side brightness is below the sensitivity of the TESS data, which raises questions about what is really happening there,’ Dr Shporer said.

    ‘Is the temperature there very cold, or does the planet somehow take heat on the day side and transfer it to the night side?

    ‘We’re at the beginning of trying to answer this question for these ultrahot Jupiters.

    2M0437b: One of the youngest planets ever found

    Astronomers have discovered ‘one of the youngest planets ever foundin deep space, which could shed new light into how planets are formed.

    The planet, known as 2M0437b, is ‘several million yearsold and is estimated to be a ‘few times more massive than Jupiter,’ according to an international team of scientists, led by those at the University of 하와이, who made the discovery.

    Astronomers discovered 'one of the youngest planets ever found' 400 지구에서 광년. Exoplanet 2M0437b is 'several million years' old and estimated to be a 'few times more massive than Jupiter'

    Astronomers discovered ‘one of the youngest planets ever found’ 400 지구에서 광년. Exoplanet 2M0437b is ‘several million yearsold and estimated to be a ‘few times more massive than Jupiter

    As 2M0437b is still early in its lifespan, it is still hot from the energy released during its formation.

    It has a temperature similar to ‘the lava erupting from Kīlauea Volcano,’ 에 따르면 성명서 announcing the discovery.

    The planet, 대충 400 지구에서 광년, was first spotted in 2018 using the Subaru Telescope.

    그때부터, researchers were studying the object with the Keck Observatory on Maunakea to make sure it was truly a companion to the 2M0437 star.

    TOI-1518b: Ultra-hot Jupiter with iron atmosphere

    Astronomers have discovered a new ultra-hot Jupiter-like exoplanet in deep space that has an interesting characteristic: its atmosphere contains iron.

    Known as TOI-1518b, this planet was observed when NASA‘s Transiting Exoplanet Survey Satellite (TESS) was observing the star TOI-1518.

    The planet was discovered while NASA's Transiting Exoplanet Survey Satellite was observing the star TOI-1518

    The planet was discovered while NASA’s Transiting Exoplanet Survey Satellite was observing the star TOI-1518

    The new planet has a radius of approximately 1.875 Jupiter and its mass is just over twice that of Jupiter, according to researchers at Yale University, who made the observation.

    ‘Prompted by recent detections of atomic and ionized species in ultra-hot Jupiter atmospheres, we conduct an atmospheric cross-correlation analysis,’ the researchers wrote in the study.

    ‘We detect neutral ironadding another object to the small sample of highly irradiated gas-giant planets with [iron] detections in transmission,’ the authors wrote in the study.

    코코넛-2b: Oven temperature surface

    이상 4,000 많은 외계행성이 확인되었다. 7,600 가능한 후보자, 그러나 University of the University의 연구원은 하와이 외행성을 직접 촬영한 35 지구에서 광년 떨어져, 지금까지 가장 가까운 이미지.

    새로운 행성은 COCONUTS-2b로 알려져 있으며 별의 주위를 도는 거리에서 6,000 지구가 태양을 도는 것보다 몇 배 더 멀리, 현재까지 발견된 두 번째로 추운 외계행성,’ 에 따르면 성명서.

    천문학자가 외계행성을 발견하다 35 쿠키를 굽기에 충분한 표면 온도를 가진 지구로부터 광년 320 화씨

    천문학자가 외계행성을 발견하다 35 쿠키를 굽기에 충분한 표면 온도를 가진 지구로부터 광년 320 화씨

    에서 320 화씨, 새로 발견된 외계 행성의 표면 온도는 대부분의 오븐에서 쿠키를 굽는 데 사용하는 것보다 약간 낮습니다., 추가된 진술.

    '초광폭 분리 궤도에 있는 거대한 행성과 함께, 그리고 아주 멋진 중앙 별과 함께, COCONUTS-2는 우리 태양계와 매우 다른 행성계를 나타냅니다.,’ 연구의 주 저자, 장저우젠, 에서 말했다 성명서.

    우리 태양계에서 가장 가까운 행성은 Epsilon Eridani를 공전합니다., 10.5 광년 떨어져, 에 따르면 NASA.

    코코넛-2b, 저질량의 적색 왜성을 공전하는, 새로 명명된 COCONUTS-2 행성계의 일부입니다..

    Nu2 Lupi: A planet with no known equivalent

    A unique exoplanet with a mass almost nine times that of Earth has been discovered after it unexpectedly ‘photobombedits star 48 광년 떨어져.

    The world was found in the constellation of Lupus, also known as Wolf, and is ‘sure to be a golden target for future studybecause there is ‘no known equivalent’, scientists have said.

    A unique exoplanet has been found after it unexpectedly 'photobombed' its star 48 광년 떨어져. An artist's impression of the Sun-like Nu2 Lupi and its three planets is shown

    A unique exoplanet has been found after it unexpectedly ‘photobombedits star 48 광년 떨어져. An artist’s impression of the Sun-like Nu2 Lupi and its three planets is shown

    WHAT DO WE KNOW ABOUT PLANET ‘DIN THE NU2 LUPI SYSTEM?

    The newly-discovered planet ‘dis one of three exoplanets orbiting a Sun-like star called Nu2 Lupi.

    Nu2 Lupi is about 48 light-years away from Earth and one of only three stars visible to the naked eye that are known to host multiple transiting planets.

    Planets ‘b’, ‘cand ‘dhave masses between those of Earth and Neptune with orbits lasting 11.6, 27.6 과 107.6 일, 각기.

    Planet d’s orbit would put it between Mercury and Venus in our solar system.

    광고

    It is the first time an exoplanet with an orbit of more than 100 days has been spotted transiting a star bright enough to be visible to the naked eye.

    The ‘hugely excitingdiscovery was made by accident while researchers were exploring two other planets in a bright nearby star system.

    All three orbit a Sun-like star called Nu2 Lupi, which is one of only three naked-eye stars known to host multiple transiting planets.

    Planets ‘b’, ‘cand the newly-discovered ‘dhave masses between those of Earth and Neptune with orbits lasting 11.6, 27.6 과 107.6 일, 각기.

    None are habitable, the European Space Agency (그) has said.

    하나, planet ‘dwill be a particularly attractive target for both the Hubble Space Telescope and the James Webb Space Telescope, when it launches at the end of this year.

    ‘Combined with its bright parent star, long orbital period, and suitability for follow-up characterisation, this makes planet d hugely exciting.

    ‘It is an exceptional object with no known equivalent, and sure to be a golden target for future study,’ said study co-author David Ehrenreich, of the University of Geneva in Switzerland.








    Scientists study the atmosphere of distant exoplanets using enormous space satellites like Hubble

    Distant stars and their orbiting planets often have conditions unlike anything we see in our atmosphere.

    To understand these new world’s, and what they are made of, scientists need to be able to detect what their atmospheres consist of.

    They often do this by using a telescope similar to Nasa’s Hubble Telescope.

    These enormous satellites scan the sky and lock on to exoplanets that Nasa think may be of interest.

    여기, the sensors on board perform different forms of analysis.

    One of the most important and useful is called absorption spectroscopy.

    This form of analysis measures the light that is coming out of a planet’s atmosphere.

    Every gas absorbs a slightly different wavelength of light, and when this happens a black line appears on a complete spectrum.

    These lines correspond to a very specific molecule, which indicates it’s presence on the planet.

    They are often called Fraunhofer lines after the German astronomer and physicist that first discovered them in 1814.

    By combining all the different wavelengths of lights, scientists can determine all the chemicals that make up the atmosphere of a planet.

    The key is that what is missing, provides the clues to find out what is present.

    It is vitally important that this is done by space telescopes, as the atmosphere of Earth would then interfere.

    Absorption from chemicals in our atmosphere would skew the sample, which is why it is important to study the light before it has had chance to reach Earth.

    This is often used to look for helium, sodium and even oxygen in alien atmospheres.

    This diagram shows how light passing from a star and through the atmosphere of an exoplanet produces Fraunhofer lines indicating the presence of key compounds such as sodium or helium

    This diagram shows how light passing from a star and through the atmosphere of an exoplanet produces Fraunhofer lines indicating the presence of key compounds such as sodium or helium

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