If you went out into space, you would explode before you suffocated because there's no air pressure.
149
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The population of the Earth has more than doubled since 1950.
151
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Pluto is smaller than Russia.
9
It 'snows' metal on Venus.
13
Earth is the only planet in our solar system that's not named after a god or goddess.
17