41% of the moon is not visible from earth at any time.
103
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Venus is the only planet that rotates clockwise.
310
Today's top fuel dragsters take off with more force than the space shuttle.
120