Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Jupiter is bigger than all the other planets combined.
254
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
Astronauts get taller when they are in space.
224
Only 55% of Americans know that the sun is a star.
986
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
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
41% of the moon is not visible from earth at any time.
103