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asteroid belt
noun
: 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
They are primarily found orbiting the sun, between the paths of Mars and Jupiter, in the main asteroid belt.
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Thomas G. Moukawsher, Newsweek, 30 Jan. 2025
The largest object in the asteroid belt, the dwarf planet Ceres, is an icy body that measures 592 miles across.
—
Jeffrey Kluger, TIME, 29 Jan. 2025
There are billions upon billions of asteroids in the roughly 92 million-mile-thick asteroid belt, according to EarthSky.org.
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Janet Loehrke, USA TODAY, 24 Nov. 2024
MBAs are asteroids that orbit the sun within the asteroid belt, a region located between the orbits of Mars and Jupiter, about 2.1 to 3.3 astronomical units (roughly 195 to 307 million miles) from our star.
—
George Monastiriakos, Newsweek, 30 Dec. 2024
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Word History
First Known Use
1867, in the meaning defined above
Dictionary Entries Near asteroid belt
Cite this Entry
“Asteroid belt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/asteroid%20belt. Accessed 8 Feb. 2025.
Kids Definition
asteroid belt
noun
: the region of interplanetary space between the orbits of Mars and Jupiter in which most asteroids are found
More from Merriam-Webster on asteroid belt
Britannica.com: Encyclopedia article about asteroid belt
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