The heart of an astronaut actually gets smaller when in outer space.
216
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
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 moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
41% of the moon is not visible from earth at any time.
103