Mars had an oxygen-rich atmosphere around 4 billion years ago
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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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Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
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The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
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In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
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The heart of an astronaut actually gets smaller when in outer space.
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Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
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