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- Asteroids are small, solid, planet-like objects that move around the sun .
- They are also known as planetoids or minor planets.
- Asteroids have their own orbits and are mostly found in the main belt between Mars and Jupiter .
- The main belt has billions of asteroids and stretches from 250 million to 600 million km from the sun.
- Asteroids are believed to be broken pieces of a planet that exploded long ago.
