If you went out into space, you would explode before you suffocated because there's no air pressure.
149
Some asteroids have other asteroids orbiting them.
131
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
It takes eight and a half minutes for light to get from the sun to earth.
159
The heart of an astronaut actually gets smaller when in outer space.
216
The population of the Earth has more than doubled since 1950.
151