The heart of an astronaut actually gets smaller when in outer space.
216
A comet's tail always points away from the sun.
2
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
41% of the moon is not visible from earth at any time.
103
The sun is 330,330 times larger than the earth!
190
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
A 100-pound person on Earth would weigh 38 pounds on Mars.
102