The heart of an astronaut actually gets smaller when in outer space.
216
There are two golf balls sitting on the moon.
721
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Pluto is smaller than Russia.
9
The Earth gets 100 tons heavier every day due to falling space dust.
673
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
41% of the moon is not visible from earth at any time.
103