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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From distant exoplanets and the universe's first galaxies to the next generation of space telescopes, astronomy's biggest annual gathering is set to deliver a week of discoveries, debates and conversations that will shape the future of astronomy. Samantha Mathewson, Space.com, 5 Jan. 2026 When space gives you lemons The exoplanet, which has been called PSR J2322-2650b, was found using NASA’s James Webb telescope. Devika Rao, TheWeek, 5 Jan. 2026 Many space- and ground-based telescopes hunt for exoplanets this way, but Pandora will take it a step further, looking not just at the intensity of the starlight but at the chemical spectrum of that portion of it that passes through the atmosphere of the planet. Jeffrey Kluger, Time, 2 Jan. 2026 While Pandora’s primary goal is to abet the understanding of exoplanets, its secondary goal is showing the capability of public partnerships with commercial space-faring companies for space exploration. Chase Hunter, Mercury News, 26 Dec. 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 13 Jan. 2026.

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