What does the asteroid belt look like?

The asteroid belt is a vaguely elliptical band between the orbits of Mars and Jupiter. This 'belt' contains different sizes of space rock and dust that is trapped in orbit between the two planets. The rocks within the belt tend to travel in loose clusters.

While collisions occur, the actual spacing between individual large asteroids can be measured in tens of thousands of kilometers. And while there may be more than a million asteroids over 1 km in diameter, their combined mass is only about twice that of the largest asteroid, the dwarf planet Ceres.