Extrasolar planet

An extrasolar planet (or exoplanet) is a planet which orbits a star other than the Sun, and therefore belongs to a planetary system other than our solar system.

Related Topics:
Planet - Orbit - Star - Sun - Planetary system - Solar system

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Although extrasolar planets were long posited, no planets orbiting main sequence stars were discovered until the 1990s. The discovery of extrasolar planets raises the question of whether they support extraterrestrial life.

Related Topics:
Main sequence - 1990s - Extraterrestrial life

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