Summer on Uranus lasts for 21 years.
358
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The heart of an astronaut actually gets smaller when in outer space.
216
Jupiter is bigger than all the other planets combined.
254
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The population of the Earth has more than doubled since 1950.
151
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