Exoplanets

alt=Timelapse of exoplanets orbit motion|thumb|upright=1.5|Four exoplanets of the HR 8799 system imaged by the [[W. M. Keck Observatory over the course of seven years. Motion is interpolated from annual observations.]] thumb|295x295px|Comparison of the size of exoplanets orbiting Kepler-37 to Mercury, Mars and Earth An exoplanet or extrasolar planet is a planet outside of the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first detected in 1988, was confirmed in 2003.

thumb|upright=1.1|Artist's conception of a mini-Neptune or "gas dwarf"

Proposed scale on how similar a Planetary-mass object or natural satellite is to earth

thumb|Artist's impression of 2M1207b A super-Jupiter is a gas giant exoplanet that is more massive than the planet Jupiter. For example, companions at the planet–brown dwarf borderline have been called super-Jupiters, such as around the star Kappa Andromedae.

area of study

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