A comet's tail always points away from the sun.
2
If two pieces of metal touch in space, they become permanently stuck together.
808
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
The heart of an astronaut actually gets smaller when in outer space.
216
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The earth travels through space at 660,000 miles per hour.
189
41% of the moon is not visible from earth at any time.
103