Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
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
41% of the moon is not visible from earth at any time.
103
Astronauts get taller when they are in space.
224
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9