exoplanet

noun

exo·​plan·​et ˈek-sō-ˌpla-nət How to pronounce exoplanet (audio)
ˌek-sō-ˈpla-
: a planet orbiting a star that is not our sun

Examples of exoplanet in a Sentence

Recent Examples on the Web
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All of the Unistellar telescopes can be used for citizen science observations and while the expert models (eVscope 2 and eQuinox 2) offer a sensitivity advantage for asteroid and exoplanet detection, sky quality remains a crucial factor. Harry Bennett, Space.com, 27 Jan. 2026 One of Burns’s collaborators on LuSEE-Night, astronomer Gregg Hallinan of Caltech, would like such a telescope to further his research on electromagnetic activity around exoplanets, a possible measure of whether these distant worlds are habitable. IEEE Spectrum, 20 Jan. 2026 This pattern could exist elsewhere, too, on other habitable exoplanets with similar properties to Earth. Devika Rao, TheWeek, 20 Jan. 2026 The private space observatory’s advanced instruments will include a wide-field optical imager, an integral field spectrograph, and a high-contrast coronagraph optimized for direct imaging of exoplanets. Chris Young, Interesting Engineering, 14 Jan. 2026 See All Example Sentences for exoplanet

Word History

First Known Use

1992, in the meaning defined above

Time Traveler
The first known use of exoplanet was in 1992

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Cite this Entry

“Exoplanet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exoplanet. Accessed 3 Feb. 2026.

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