The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
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
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
It 'snows' metal on Venus.
13
There are two golf balls sitting on the moon.
721
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
