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.
Four New Exoplanets An exoplanet is a planet that orbits a star other than the sun. Jamie Carter, Forbes.com, 6 July 2025 Since the mid-1990s, when the first exoplanets were discovered, astronomers have pondered whether exoplanets can orbit their stars closely enough that stellar magnetic fields are impacted. Robert Lea, Space.com, 2 July 2025 The new exoplanet's mass is estimated to be slightly greater than Jupiter's, the researchers said. Julia Jacobo, ABC News, 18 June 2025 New exoplanet image from NASA's Webb suggest freezing temps Webb’s new image of 14 Herculis c has given researchers insight into the exoplanet’s temperature, strange orbit and atmosphere. Eric Lagatta, USA Today, 12 June 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 21 Jul. 2025.

Last Updated: - Updated example sentences
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