The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
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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.
10
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6