Venus is the only planet that rotates clockwise.
310
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
41% of the moon is not visible from earth at any time.
103
Only 55% of Americans know that the sun is a star.
986
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Today's top fuel dragsters take off with more force than the space shuttle.
120
The population of the Earth has more than doubled since 1950.
151
If you went out into space, you would explode before you suffocated because there's no air pressure.
149