Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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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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The sun is 330,330 times larger than the earth!
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
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The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
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