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This is a List of exoplanets discovered in 2012. [1] For exoplanets detected only by radial velocity, the mass value is actually a lower limit. (See Minimum mass for more information)
Astrometry has been used to discover a handful number of exoplanets, mostly gas giants more massive than Jupiter. It is based on measuring a star's proper motion, and seeing how that position changes over time: a planet with a sufficiently large mass is able to gravitationally pull its host star, making its proper motion vary over large timescales.
In 2012, Johnson's team discovered three small rocky exoplanets in a red dwarf star system observed with the Kepler space telescope. [13] The system was renamed Kepler-42 and the outermost planet was found to be nearly as small as Mars, making it the smallest known exoplanet at the time. [14]
Motion interpolation of seven images of the HR 8799 system taken from the W. M. Keck Observatory over seven years, featuring four exoplanets. This is a list of extrasolar planets that have been directly observed, sorted by observed separations. This method works best for young planets that emit infrared light and are far from the glare of the star.
A potentially habitable exoplanet that is roughly similar in size to Earth has been found in a system located 40 light-years away, according to a new study.
2012 TV is a near-Earth Apollo asteroid with an estimated diameter of 30 metres (98 ft). [2] Its closest approach to the Earth was on October 7, 2012, with a distance of 0.0017 astronomical units (250,000 km; 160,000 mi). [3] It also approached the Moon an hour earlier with a distance of 0.0028 astronomical units (420,000 km; 260,000 mi). [3]
A European Space Agency satellite has observed the shiniest exoplanet ever discovered. The scorching world has reflective clouds made of silicates and titanium.
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]