Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
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It takes eight and a half minutes for light to get from the sun to earth.
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More than 20 million meteoroids enter Earth's atmosphere every day.
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The heart of an astronaut actually gets smaller when in outer space.
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If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
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In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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