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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The stakes are high for exoplanets, too, where a small push in atmosphere, clouds, or volcanism could lock worlds into hellish states. Kaif Shaikh, Interesting Engineering, 11 Sep. 2025 Indeed, brown dwarfs could also help investigate exoplanet habitability conditions despite not being able to support life themselves. Robert Lea, Space.com, 11 Sep. 2025 By studying exoplanet hazes in this three-pronged fashion — with observations, laboratory synthesis, and theoretical modeling — one more tool for investigating these alien worlds is bringing our view of the Universe into better focus. Ethan Siegel, Big Think, 10 Sep. 2025 The exoplanet, named TRAPPIST-1 e, is being monitored by the James Webb Space Telescope, the most powerful telescope ever launched into space. Julia Jacobo, ABC News, 10 Sep. 2025 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 17 Sep. 2025.

Last Updated: - Updated example sentences
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