Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Earth is the only planet in our solar system that's not named after a god or goddess.
17
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
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