The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
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.
13
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277