Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Sound doesn't travel in space.
255
Today's top fuel dragsters take off with more force than the space shuttle.
120
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
There are two golf balls sitting on the moon.
721
The earth is .02 degrees hotter during a full moon.
157
Some asteroids have other asteroids orbiting them.
131