Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
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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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
It 'snows' metal on Venus.
13
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.
31
If NASA sent birds into space they would soon die; they need gravity to swallow.
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