Science Of...

How Many Asteroids Are There?

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The asteroid belt sits between the orbits of Mars and Jupiter, and contains millions of large and small asteroids. Most of the solar system's asteroids are found in the belt, but you might not know it if you went there for vacation—the belt is so spacious that asteroids would rarely, if ever, be as densely packed as they are in the movies.

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Key Facts In This Video

  1. Most of the asteroids in our solar system are found within the asteroid belt. 01:22

  2. The asteroid belt has .7 to 1.7 million asteroids with a diameter of 1 km or more. 02:30

  3. Asteroids don't sit still in space; they move at very fast velocities. 04:01

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