An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
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 light hitting the earth right now is 30 thousand years old.
163
The heart of an astronaut actually gets smaller when in outer space.
216
The sun is 330,330 times larger than the earth!
190
41% of the moon is not visible from earth at any time.
103
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115