The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
There are two golf balls sitting on the moon.
721
It 'snows' metal on Venus.
13
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The population of the Earth has more than doubled since 1950.
151
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
