Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Sound doesn't travel in space.
255
There are two golf balls sitting on the moon.
721
The sun is 330,330 times larger than the earth!
190
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
Pluto is smaller than Russia.
9