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

Example Sentences

Recent Examples on the Web Barium is the heaviest element ever discovered within the atmosphere of an exoplanet. Ashley Strickland, CNN, 13 Oct. 2022 And, of course, keep up with the other discoveries Webb has made, like the first image of an exoplanet ever captured. Joshua Hawkins, BGR, 15 Sep. 2022 Astronomers plan to conduct additional observations of the rare exoplanet using NASA's James Webb Telescope. Ariana Garcia, Chron, 25 Oct. 2022 Situated some 580 light-years away from Earth, the exoplanet is orbiting a red dwarf star in the Auriga constellation. Sarah Kuta, Smithsonian Magazine, 25 Oct. 2022 The exoplanet in question is named GJ 1252b, and it was discovered back in 2020. Joshua Hawkins, BGR, 24 Oct. 2022 The latest exoplanet images also bode well for Elisabeth Matthews, a postdoctoral researcher at the University of Geneva. Daniel Leonard, Scientific American, 22 Sep. 2022 The exoplanet orbits its star within the habitable zone, allowing for the possibility of liquid water on the planet’s surface. Tim Newcomb, Popular Mechanics, 21 Sep. 2022 Check out its first direct image of a gas giant exoplanet as well as a spellbinding view of the Phantom Galaxy. Ashley Strickland And Katie Hunt, CNN, 3 Sep. 2022 See More

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.

Word History

First Known Use

1992, in the meaning defined above

Time Traveler
The first known use of exoplanet was in 1992

Dictionary Entries Near exoplanet

Cite this Entry

“Exoplanet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exoplanet. Accessed 27 Nov. 2022.

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