Most asteroids can be found orbiting the sun between mars and jupiter within the main asteroid belt. Asteroid, any of a host of small bodies, about 1,000 km (600 miles) or less in diameter, that orbit the sun primarily between the orbits of mars and jupiter in a nearly flat ring called the asteroid belt Hundreds of thousands of asteroids are known. What are asteroids, where do they come from and how can you see an asteroid in the night sky A guide to these fascinating space rocks. There are three general types of asteroids
The names are based on the type of material believed to make up most of the surface material
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