Only 55% of Americans know that the sun is a star.
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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.
7
It takes eight and a half minutes for light to get from the sun to earth.
159
The sun is 330,330 times larger than the earth!
190
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115