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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.
The exoplanets were found using a statistical technique called "verification by multiplicity". 95% of the discovered exoplanets were smaller than Neptune and four, including Kepler-296f, were less than 2 1/2 the size of Earth and were in habitable zones where surface temperatures are suitable for liquid water. [17] [18] [19]
In 2016, the numbers 462 and 442 were found in computed tomography scans of the inscriptions dealing with Venus and Saturn, respectively. [22] These relate to the synodic cycles of these planets, and indicated that the mechanism was more accurate than previously thought. In 2018, based on the CT scans, the Antikythera Mechanism Research Project ...
DMPP-1 [66] Found by Dispersed Matter Planet Project looking for hot ablating planets. HD 38677 c: 6.584 +0.003 −0.002: 0.0733 +0.0006 −0.0007: 1239 radial vel. 202.2169 ± 3.261564 1.21 ± 0.03 6196 ± 29 DMPP-1 [66] Found by Dispersed Matter Planet Project looking for hot ablating planets, 2:1 orbital resonance of unconfirmed transiting ...
The planet is about the size of Venus, so slightly smaller than Earth, and may be temperate enough to support life, the researchers said. Dubbed Gliese 12 b, the planet takes 12.8 days to orbit a ...
Tadmor: The radial velocity variations of the star Errai were announced in 1989, consistent with a planet in a 2.5-year orbit. [5] However, misclassification of the star as a giant combined with an underestimation of the orbit of the Gamma Cephei binary, which implied the planet's orbit would be unstable, led some astronomers to suspect the variations were merely due to stellar rotation.
An image of the planet Uranus taken by the NASA spacecraft Voyager 2 in 1986. New research using data from the mission shows a solar wind event took place during the flyby, leading to a mystery ...
But eventually more planets of other sorts were found, and it is now clear that hot Jupiters make up the minority of exoplanets. [68] In 1999, Upsilon Andromedae became the first main-sequence star known to have multiple planets. [71] Kepler-16 contains the first discovered planet that orbits a binary main-sequence star system. [72]