One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
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
Venus is the only planet that rotates clockwise.
310
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
41% of the moon is not visible from earth at any time.
103
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The light hitting the earth right now is 30 thousand years old.
163
Pluto is smaller than Russia.
9