An asteroid is a mass of rock orbiting the sun that is not a planet, comet, or meteor. They range in size from a few kilometers to several hundred kilometers. They contain no atmosphere. They are also sometimes called small or minor planetoids.
An asteroid is a mass of rock orbiting the sun that is not a planet, comet, or meteor. They range in size from a few kilometers to several hundred kilometers. They contain no atmosphere. They are also sometimes called small or minor planetoids.
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