Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The population of the Earth has more than doubled since 1950.
151
There are two golf balls sitting on the moon.
721
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
The heart of an astronaut actually gets smaller when in outer space.
216