Assertion: asteroid belt's asteroid | /r/HasProperty | the size of pebbles
Facets:
Source sentences:
text: While most asteroids may be only the size of pebbles, 16 asteroids have a diameter of 240 km (150 miles) and Ceres, the largest, has a diameter of about about 914 km (568 miles).
text: Many people might be surprised to learn that most asteroids in the main belt are only the size of a pebble.