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The top documents tagged [rotation planet]
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rotation planet
The Universe, Solar System, and Planets I Questions: How do we know the Big Bang happened? How do we know the Universe is expanding? What is the timeframe.
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186,000 miles a second 300,000,000 meters per second 700 million miles an hour. For scale, the distance from the Earth to the Moon is about 239,000 miles.
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