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

Astronomers have used a brand new technique to get a direct look at a nearby exoplanet. Avery Thompson, Popular Mechanics, "New Method For Studying Exoplanets Could Tell Us Far More About Alien Worlds," 29 Mar. 2019 The first involves the amount of light blocked while the exoplanet orbits its host star. John Timmer, Ars Technica, "Do we have evidence for an exomoon? Ask again in a year.," 4 Oct. 2018 Directly imaging an exoplanet, however, is a monumental task, especially the ones the size of Earth. Loren Grush, The Verge, "The search for alien life needs a new space telescope, astronomers say," 8 Sep. 2018 The papers, both published in The Astrophysical Journal Letters on 13 June, mark the first planets detected using the ALMA and perhaps the youngest exoplanets ever detected. Daniel Clery, Science | AAAS, "This distant disk may contain the youngest exoplanets ever detected," 14 June 2018 Merrin Peterson, a graduate student from the Institute for research on exoplanets is the lead author on the study. Chris Ciaccia, Fox News, "Exoplanet 'twice the size of Earth' discovered 145 light-years away," 6 Sep. 2018 But while humanity has proven great at finding exoplanets attached to stars, scientists have only identified a dozen or so rogues. David Grossman, Popular Mechanics, "Two More Mysterious Rogue Planets Found," 9 Nov. 2018 An exoplanet twice the size of Earth, known as Wolf 503b, has been found just 145 light-years away from our home planet. Chris Ciaccia, Fox News, "Exoplanet 'twice the size of Earth' discovered 145 light-years away," 6 Sep. 2018 The Transiting Exoplanet Survey Satellite mission, launched in April and declared operational in late November, will find an estimated 14,000 exoplanets. Joe Pappalardo, Popular Mechanics, "We're Recreating Alien Atmospheres on Earth To Search for Life Beyond the Solar System," 20 Dec. 2018

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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Last Updated

30 Apr 2019

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The first known use of exoplanet was in 1992

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More from Merriam-Webster on exoplanet

Britannica English: Translation of exoplanet for Arabic Speakers

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to speak slightingly about or to degrade

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