The earth travels through space at 660,000 miles per hour.
189
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The Earth gets 100 tons heavier every day due to falling space dust.
673
The population of the Earth has more than doubled since 1950.
151
The heart of an astronaut actually gets smaller when in outer space.
216
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
A comet's tail always points away from the sun.
2
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124