exoplanet

noun
exo·​plan·​et | \ ˈek-sō-ˌpla-nət How to pronounce exoplanet (audio) , ˌek-sō-ˈpla- \

Definition of exoplanet

: a planet orbiting a star that is not our sun

Examples of exoplanet in a Sentence

Recent Examples on the Web This giant exoplanet zips around the star remnant, which is about the size of Earth, in a very close orbit every 34 hours. Ashley Strickland, CNN, "Giant planet found orbiting a dead white dwarf star," 16 Sep. 2020 Until then no one had detected an exoplanet, much less a potentially hospitable one, but that decade brought a host of discoveries. Daniel Clery, Science | AAAS, "How big money is powering a massive hunt for alien intelligence," 10 Sep. 2020 In June 2016, exoplanet Kepler-1647 b was discovered 3,700 light-years from Earth. Chris Ciaccia, Fox News, "Three-star system in deep space may be home to planet, researchers find," 6 Sep. 2020 Since astronomers snapped the first direct image of an exoplanet in 2004, fewer than 50 exoplanets have had their pictures taken. Jennifer Leman, Popular Mechanics, "We've Never Witnessed Exoplanets Orbiting a Sun-Like Star. That Changes Now.," 22 July 2020 These efforts chime with searches for biosignatures, detectable marks that organic life might leave on an exoplanet. Daniel Clery, Science | AAAS, "How big money is powering a massive hunt for alien intelligence," 10 Sep. 2020 Inside the rings could be dust, or the beginnings of a young exoplanet, which could explain the misalignment of the system's gravitational pull. Chris Ciaccia, Fox News, "Three-star system in deep space may be home to planet, researchers find," 6 Sep. 2020 If scientists are able to detect an ozone layer or oxygen on a neighboring exoplanet, there’s a possibility that the planet may harbor life. Claire Bugos, Smithsonian Magazine, "Scientists Use Moon as Mirror in Hunt for Extraterrestrial Life," 10 Aug. 2020 In June 2016, exoplanet Kepler-1647 b was discovered 3,700 light-years from Earth. Chris Ciaccia, Fox News, "NASA finds active 'Star Wars' galaxy in deep space," 27 Aug. 2020

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.

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First Known Use of exoplanet

1992, in the meaning defined above

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The first known use of exoplanet was in 1992

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Last Updated

26 Sep 2020

Cite this Entry

“Exoplanet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exoplanet. Accessed 28 Sep. 2020.

More from Merriam-Webster on exoplanet

Britannica English: Translation of exoplanet for Arabic Speakers

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