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Only pulsar with a multiplanetary system, and first exoplanets and multiplanetary system to be confirmed. [121] [122] Star with dimmest apparent magnitude to have a multiplanetary system. Kepler-62: Lyra: 18 h 52 m 51.060 s +45° 20′ 59.507″ 13.75 [123] 990: K2V [123] 0.69: 4925: 7: 5: Planets e and f orbit in the habitable zone. [123] [124 ...
This list of exoplanets discovered in 2025 is a list of confirmed exoplanets that were first reported in 2025. For exoplanets detected only by radial velocity, the listed value for mass is a lower limit. See Minimum mass for more information.
This plot illustrates the radius 'gap' The small planet radius gap (also called the Fulton gap, [1] photoevaporation valley, [2] [3] or Sub-Neptune Desert [4]) is an observed scarcity of planets with radii between 1.5 and 2 times Earth's radius, likely due to photoevaporation-driven mass loss.
Binary system 45 AU apart ... Least massive (confirmed mass) Most massive (confirmed mass) Lowest surface insolation: Highest surface insolation:
This article is a list of notable unsolved problems in astronomy. Problems may be theoretical or experimental. Theoretical problems result from inability of current theories to explain observed phenomena or experimental results. Experimental problems result from inability to test or investigate a proposed theory.
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 2020, James Green modeled the coupled planet-moon-magnetosphere habitable zone. The modeling showed a coupled planet–moon magnetosphere that would give planet the protection from stellar wind in the early Solar System. In the case of Earth, the Moon was closer to Earth in the early formation of the solar system, giving added protection.
This is a list of confirmed exoplanets within the circumstellar habitable zone that are either under 10 Earth masses or smaller than 2.5 Earth radii, and thus have a chance of being rocky. [3] [1] Note that inclusion on this list does not guarantee habitability, and in particular the larger planets are more unlikely to have a rocky composition. [4]