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When were asteriods made?

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Anonymous

13y ago
Updated: 8/20/2019

We believe that most of the asteroids are composed of mass that was "left over" from the formation of the solar system 4.5 billion years ago, that was never part of any planet. So, to the extent that they have an ago, we would say that the asteroids themselves are 4.5 billion years old.

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Wiki User

13y ago

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