A comet's tail always points away from the sun.
2
Only 55% of Americans know that the sun is a star.
986
Astronauts get taller when they are in space.
224
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The heart of an astronaut actually gets smaller when in outer space.
216
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175