Overview | What is an Exoplanet? – Exoplanet ... - Exoplanet …
https://exoplanets.nasa.gov/what-is-an-exoplanet/overview/
webApr 2, 2021 · An exoplanet is any planet beyond our solar system. Most orbit other stars, but free-floating exoplanets, called rogue planets, orbit the galactic center and are untethered to any star. Overview. Most of the exoplanets discovered so far are in a relatively small region of our galaxy, the Milky Way. definition
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