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.
Scientists expected to find phosphine in other brown dwarfs and gas giant exoplanets. Chris Young, Interesting Engineering, 10 Nov. 2025 But a team of Australian researchers created an AI algorithm that fixes the problem — a major relief for the scientific community, which hopes to use the instrument to search for exoplanets around stars in our Milky Way galaxy. Tereza Pultarova, Space.com, 5 Nov. 2025 Roman is designed to answer questions regarding the habitability of exoplanets and the nature of dark energy, which is thought to make up 68% of the universe. Jeffrey Kluger, Time, 5 Nov. 2025 Astronomers have managed to bring an exoplanet into unprecedented focus by using a technique the researchers call 3D eclipse mapping. Eric Lagatta, USA Today, 30 Oct. 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 Nov. 2025.

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