In the last 7 years, humanity has discovered 43 potentially habitable planets.
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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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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.
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Astronauts cannot burp in space.
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Pluto is smaller than Russia.
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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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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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