41% of the moon is not visible from earth at any time.
103
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
The light hitting the earth right now is 30 thousand years old.
163
In outer space there exists a gigantic cloud of alcohol which can be used to produce 400 trillion trillion pints of beer.
31
The earth rotates more slowly on its axis in March than in September.
145
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Today's top fuel dragsters take off with more force than the space shuttle.
120