Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Astronauts cannot burp in space.
232
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
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
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46