The light hitting the earth right now is 30 thousand years old.
163
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
Pluto is smaller than Russia.
9
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Some asteroids have other asteroids orbiting them.
131