Earth is the only planet in our solar system that's not named after a god or goddess.
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Pluto is smaller than Russia.
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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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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
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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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The Earth gets 100 tons heavier every day due to falling space dust.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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