One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
It takes eight and a half minutes for light to get from the sun to earth.
159
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Sound doesn't travel in space.
255
41% of the moon is not visible from earth at any time.
103