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List Of Exoplanets Discovered In 2021
This list of exoplanets discovered in 2021 is a list of confirmed exoplanets that were first observed in 2021. For exoplanets detected only by radial velocity, the listed value for mass is a lower limit. See Minimum mass for more information. Specific exoplanet lists References {{Portal bar, Astronomy, Stars, Spaceflight, Solar System, Science Lists of exoplanets, 2021 Exoplanets discovered in 2021, * 2021-related lists, exoplanets ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exoplanet
An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, initially detected in 1988, was confirmed in 2003. There are many methods of detecting exoplanets. Transit photometry and Doppler spectroscopy have found the most, but these methods suffer from a clear observational bias favoring the detection of planets near the star; thus, 85% of the exoplanets detected are inside the tidal locking zone. In several cases, multiple planets have been observed around a star. About 1 in 5 Sun-like starsFor the purpose of this 1 in 5 statistic, "Sun-like" means G-type star. Data for Sun-like stars was not available so this statistic is an extrapolation from data about K-type stars. have an "Earth-sized"For the purpose of this 1 in 5 statistic, Earth-sized means 1–2 Earth radii. planet in the habitable zone. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TOI-1478 B
TOI-1478 b is an exoplanet that was discovered by TESS Tess or TESS may refer to: Music * Tess (band), a Spanish pop band active from 2000 to 2005 * TESS (musician), a UK musician Film and theatre * ''Tess'' (1979 film), a 1979 film adaptation of '' Tess of the d'Urbervilles'' * ''Tess'' (2016 film) ... in January 2021. It has an orbital period of 10.2 days and is 499 light years away from Earth. References Exoplanets discovered in 2021 Exoplanets discovered by TESS {{exoplanet-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TOI-178c
TOI-178c is a potentially rocky exoplanet that orbits the K-type star TOI 178, 204.4783 light years from Earth. TOI-178c's radius is 1.669 x that of Earth, and its mass is 4.77 that of Earth's, making TOI-178c a super earth. TOI 178c mass was discovered by the radial velocity method with the radius detected by the primary transit method. The orbital radius is 0.037 AU, with an eccentricity of 0.0. A year on TOI-178c is 3.2 days long. TOI-178c was discovered by using the transit method in 2021. TOI-178b, TOI-178d, TOI-178e, TOI-178f, TOI-178g are all in the same system as TOI-178c. The temperature on TOI 178c is 873 Kelvin The kelvin, symbol K, is the primary unit of temperature in the International System of Units (SI), used alongside its prefixed forms and the degree Celsius. It is named after the Belfast-born and University of Glasgow-based engineer and phys ...; the hottest point longitude unknown. References Exoplanets discovered in 2021 Exoplanets discovered by T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KOI-5Ab
KOI-5 is a triple star system composed of three stars: KOI-5 A, KOI-5 B and KOI-5 C, orbiting 1,870 light-years away. The two dim stellar companions to KOI-5A were discovered in 2016. KOI-5 A and B orbit each other every 29 years, and KOI-5 C orbits stars A and B every 400 years. KOI-5C is physically associated with the core stellar pair with probability 99.98%. Planetary system Two planets orbiting one of KOI-5's stars were suspected since 2009 based on Kepler data, but KOI-5Ab was confirmed only in January 2021 after TESS Tess or TESS may refer to: Music * Tess (band), a Spanish pop band active from 2000 to 2005 * TESS (musician), a UK musician Film and theatre * ''Tess'' (1979 film), a 1979 film adaptation of '' Tess of the d'Urbervilles'' * ''Tess'' (2016 film) ... determined the planet is orbiting KOI-5A. The exoplanet has caused interest in the scientific community because its orbital plane is misaligned with the closer star, suggesting it gave KOI-5Ab a gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small Planet Radius Gap
The small planet radius gap (also called the Fulton gap, photoevaporation valley, or Sub-Neptune Desert) is an observed scarcity of planets with radii between 1.5 and 2 times Earth's radius, likely due to photoevaporation-driven mass loss. A bimodality in the Kepler exoplanet population was first observed in 2013, and was noted as possibly confirming an emerging hypothesis that photoevaporation could drive atmospheric mass loss on close-in, low-mass planets. This would lead to a population of bare, rocky cores with smaller radii at small separations from their parent stars, and planets with thick hydrogen- and helium-dominated envelopes with larger radii at larger separations. The bimodality in the distribution was confirmed with higher-precision data in the California-Kepler Survey in 2017, which was shown to match the predictions of the photoevaporative mass-loss hypothesis later that year. Despite the implication of the word 'gap', the Fulton gap does not actually represent a r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
