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5 Cards in this Set

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  • Back
When did our Solar System begin to form?

5 billion years ago

What is a nebula?
a large, diffuse cloud of dust and gas in space
How did our Solar System begin to form?
A large cloud of dust and gas began to contract under the force of gravity.
Where did the energy of the Sun come from originally?
thermal energy that was converted from the gravitational energy of the original nebula collapse
The light areas of the moon were formed by
small meteor impacts.