Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
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
Astronauts get taller when they are in space.
224
The light hitting the earth right now is 30 thousand years old.
163
Pluto is smaller than Russia.
9
It takes eight and a half minutes for light to get from the sun to earth.
159
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88