The phrase "asteroid belt" refers to a region in our solar system located between Mars and Jupiter. It is filled with many small rocky objects called asteroids that orbit the Sun. Full definition
The team used a new search technique that also identified the oldest known asteroid family, which extends throughout the inner region of the main asteroid belt. (sciencedaily.com)
In space, Nysa is a group of asteroids in the main asteroid belt between Mars and Jupiter. (babygaga.com)
«Herschel telescope detects water on dwarf planet in asteroid belt.» (sciencedaily.com)