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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When a massive power outage struck southern California in the 1990s, Los Angeles residents reportedly called 911 to express alarm about strange clouds hovering overhead; they were seeing the Milky Way for the first time.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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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
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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