Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Sound doesn't travel in space.
255
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
The light hitting the earth right now is 30 thousand years old.
163
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131