What causes astronauts to float in space? What keeps the Moon in orbit around the Earth?
In answer to the first question, many students would say that astronauts float in space due to the absence of gravity. They also might answer that gravity keeps the moon in orbit around Earth. But these answers present a contradiction. In fact, astronauts appear to float in orbit, and the moon orbits the Earth because of gravity.What causes astronauts to float in space? What keeps the Moon in orbit around the Earth?
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