exoplanet
An exoplanet (exo-planet), is an extra-solar (outside of our solar system) planet orbiting a star, other than the Sun, within our Milky Way galaxy.
The Kepler Telescope mission has discovered 4,000+ confirmed exoplanets in all, as of February 2015.
exoplanet by DaleBryTheScienceGuy September 2, 2016
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