Top Definition
Any planet that navigates around a star, other than the Sun, is an exoplanet.
Many planets (over 200) have been discovered in the nineties that don't go around our Sun. They are exoplanets.
by darksongbird April 02, 2009
2 more definitions
An extra-solar (beyond our solar system) planet orbiting a star, other than the Sun, but within our Milky Way galaxy.
The Kepler Telescope mission has discovered 4,000+ confirmed exoplanets in all, as of February 2015.
by DaleBryTheScienceGuy May 03, 2015
An extra-solar (beyond our solar system) planet orbiting another star within our Milky Way galaxy.
The Kepler Telescope mission has discovered 4,000+ confirmed exoplanets in all as of February 2015.
by DaleBryTheScienceGuy May 03, 2015

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