Kuiper Belt

noun

Kui·​per Belt ˈkī-pər- How to pronounce Kuiper Belt (audio)
: a band of small celestial bodies beyond the orbit of Neptune from which many short-period comets are believed to originate compare oort cloud

Examples of Kuiper Belt in a Sentence

Recent Examples on the Web
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Neptune's gravity is thought to have captured its largest moon, Triton, from the vast disk of the Kuiper Belt, which is home to countless small bodies, including a number of dwarf planets. Chelsea Gohd, Space.com, 20 May 2026 The results were compared with data from 54 Kuiper Belt bodies, also from James Webb observations. Jacopo Prisco, CNN Money, 20 May 2026 The technology could also support missions to Neptune and Triton, long-duration probes studying outer planet moons, and future Kuiper Belt explorers traveling farther than New Horizons. Aamir Khollam, Interesting Engineering, 15 May 2026 Astronomers have long been fascinated by the unusual behavior of objects orbiting the Sun in the Kuiper Belt, a scattered disc of minor planets beyond the orbit of Neptune. Victor Tangermann, Futurism, 6 May 2026 See All Example Sentences for Kuiper Belt

Word History

Etymology

Gerald A. Kuiper †1973 U.S. (Dutch-born) astronomer

First Known Use

1988, in the meaning defined above

Time Traveler
The first known use of Kuiper Belt was in 1988

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Cite this Entry

“Kuiper Belt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Kuiper%20Belt. Accessed 29 May. 2026.

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