Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
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
A comet's tail always points away from the sun.
2
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
Some asteroids have other asteroids orbiting them.
131