41% of the moon is not visible from earth at any time.
103
Sound doesn't travel in space.
255
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The earth travels through space at 660,000 miles per hour.
189
Today's top fuel dragsters take off with more force than the space shuttle.
120