An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Jupiter is bigger than all the other planets combined.
254
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
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
A comet's tail always points away from the sun.
2
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46