There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
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The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The heart of an astronaut actually gets smaller when in outer space.
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The population of the Earth has more than doubled since 1950.
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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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