exoplanet

American  

[ek-soh-plan-it] / ˈɛk soʊˌplæn ɪt /

noun

Astronomy.

1. a planet that revolves around a star other than the sun.

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exoplanet British  

/ ˈɛksəʊˌplænɪt /

noun

1. a planet that orbits a star in a solar system other than that of Earth

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exoplanet Scientific  

/ ĕk′sō-plăn′ĭt /

1. See extrasolar planet

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Other Word Forms

• exoplanetary adjective

Etymology

Origin of exoplanet

First recorded in 1970–75; exo- + planet

Example Sentences

Beyond our neighborhood, astronomers have identified many gas giant exoplanets, some far larger than Jupiter.

From Science Daily

Among other discoveries, the telescope produced the first ever image of an exoplanet -- a planet outside our solar system -- in 2004.

From Barron's

For the first time, researchers have followed gas escaping from an exoplanet's atmosphere continuously over a full orbit around its star.

From Science Daily

Since the 1990s, astronomers have definitively found thousands of such exoplanets, other destinations to which we might conceivably “disperse.”

From The Wall Street Journal

This marked the first time an exoplanet had been directly imaged at optical wavelengths, and it was named Fomalhaut b following standard naming rules.

From Science Daily