Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Venus is the only planet that rotates clockwise.
310
A comet's tail always points away from the sun.
2
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124