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
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
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Sound doesn't travel in space.
255
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
Today's top fuel dragsters take off with more force than the space shuttle.
120
Astronauts get taller when they are in space.
224