There are two golf balls sitting on the moon.
721
Some asteroids have other asteroids orbiting them.
131
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
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