The light hitting the earth right now is 30 thousand years old.
163
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
There are two golf balls sitting on the moon.
721
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
41% of the moon is not visible from earth at any time.
103
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Astronauts get taller when they are in space.
224
