An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Some asteroids have other asteroids orbiting them.
131
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
There are two golf balls sitting on the moon.
721
Sound doesn't travel in space.
255