asteroid belt


Definition of asteroid belt

: the region of interplanetary space between the orbits of Mars and Jupiter in which most asteroids are found

Examples of asteroid belt in a Sentence

Recent Examples on the Web Large craters up to 16 feet across spotted on the asteroid's boulders likely formed when the asteroid was still in the asteroid belt. Ashley Strickland, CNN, "Asteroid Bennu has been hanging out with Earth for over a million years," 26 Oct. 2020 During the early days of the Solar System, as planets were being formed, debris flew throughout space, much of which never became a planet or moon and wound up becoming part of the asteroid belt. Chris Ciaccia, Fox News, "NASA releases never-before-seen pictures of Bennu, an asteroid that may hold the building blocks of life," 22 Oct. 2020 All of the people who live and work on the moons, asteroids, and planetoids both in the asteroid belt and beyond it fall into this category. Kate Cox, Ars Technica, "The Expanse S5 review: The show is bigger, bolder, and better than ever," 11 Dec. 2020 The galaxy sits roughly 12 million light-years away in the constellation Ursa Major. March 4 — Asteroid 4 Vesta at Opposition: Vesta is the brightest asteroid in the night sky and second largest in the asteroid belt. Cameron Johnson, Popular Mechanics, "How To Get Started in Astronomy," 10 Nov. 2020 Bennu was once part of a much larger asteroid parent body in the main asteroid belt located between the orbits of Mars and Jupiter, scientists believe. Ashley Strickland, CNN, "Asteroid Bennu has been hanging out with Earth for over a million years," 26 Oct. 2020 Boasting a width of about 318 miles—about 15 percent of the moon’s diameter—Pallas makes up a whopping 7 percent of the total mass of the asteroid belt. Katherine J. Wu, Smithsonian Magazine, "The Most Cratered Object in the Asteroid Belt Looks Like a Golf Ball," 13 Feb. 2020 The asteroid 16 Psyche, one of the most massive objects in the main asteroid belt orbiting between Mars and Jupiter, could be made entirely of metal, according to a study published this week. Doyle Rice, USA TODAY, "This isn't your typical space rock: There's a metal asteroid out there worth $10,000 quadrillion," 29 Oct. 2020 But in 2014, Hayne and his colleagues were trying to figure out the ice distribution on Ceres, a dwarf planet in the asteroid belt that’s believed to have water trapped on the surface in a similar fashion to what was just identified on the moon. Popular Science, "New 3D moon models show it might hold up to 15,000 miles of frozen water," 27 Oct. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'asteroid belt.' 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 asteroid belt

1870, in the meaning defined above

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The first known use of asteroid belt was in 1870

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Last Updated

13 Feb 2021

Cite this Entry

“Asteroid belt.” Dictionary, Merriam-Webster, Accessed 3 Mar. 2021.

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