The earth rotates more slowly on its axis in March than in September.
145
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
The heart of an astronaut actually gets smaller when in outer space.
216
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
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
41% of the moon is not visible from earth at any time.
103
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121