The phrase "main belt" refers to a large collection of objects, usually referring to asteroids, that orbit the Sun between Mars and Jupiter. These objects form a kind of belt in space.
Sentences with «main belt»
Finding and studying asteroid families allows scientists to better understand the history of main belt asteroids. (sciencedaily.com)
Later, other cosmic bodies with similar orbits were found, marking the discovery of our solar system's main belt of asteroids. (sciencedaily.com)
If this interpretation is confirmed Ceres would seem to be very different from Vesta and the other main belt asteroids. (sciencedaily.com)