5.1.1 What is an Exoplanet? Collection

An exoplanet or extrasolar planet is a planet that orbits a star other than our own planet's Sun. The first scientific detection of an exoplanet was in 1988. However, the first confirmed detection came in 1992; since then, and as of 22 February 2017, there have been 3,583 exoplanets in 2,688 planetary systems and 603 multiple planetary systems confirmed.

Extraterrestrial Planet (Exoplanet)

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