exo·​plan·​et | \ ˈek-sō-ˌpla-nət How to pronounce exoplanet (audio) , ˌek-sō-ˈpla- \

Definition of exoplanet

: a planet orbiting a star that is not our sun

Examples of exoplanet in a Sentence

Recent Examples on the Web Kepler-16b was the first exoplanet found to circle a double star. Dean Regas, The Enquirer, 8 Sep. 2021 But as is often the case in exoplanet research, technology is still catching up to theory. Marina Koren, The Atlantic, 11 Aug. 2021 Though there was just a Nobel Prize given for exoplanet research a couple of years ago. Rivka Galchen, The New Yorker, 9 Aug. 2021 This exoplanet, or planet found orbiting a star outside of our solar system, likely began as a gaseous sub-Neptune. Ashley Strickland, CNN, 12 Mar. 2021 The Trappist-1 exoplanet system was discovered only in 2016, and Lewis has played a crucial role in exploring it, using Hubble. Rivka Galchen, The New Yorker, 9 Aug. 2021 The disk surrounds an exoplanet called PDS 70c, one of two gas giants orbiting a star nearly 400 light-years from Earth. Marina Koren, The Atlantic, 29 July 2021 Astronomers in Switzerland report unexpectedly spotting a rare kind of exoplanet around a Sun-like star less than light-years distant. Jamie Carter, Forbes, 28 June 2021 But multiple independent exoplanet surveys have shown our galaxy to be positively packed with them. Adam Frank, Scientific American, 21 July 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'exoplanet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of exoplanet

1992, in the meaning defined above

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The first known use of exoplanet was in 1992

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Last Updated

15 Sep 2021

Cite this Entry

“Exoplanet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exoplanet. Accessed 25 Sep. 2021.

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More from Merriam-Webster on exoplanet

Britannica English: Translation of exoplanet for Arabic Speakers


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