Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
A comet's tail always points away from the sun.
2
Earth is the only planet in our solar system that's not named after a god or goddess.
17
Pluto is smaller than Russia.
9
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