41% of the moon is not visible from earth at any time.
103
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The sun is 330,330 times larger than the earth!
190
The earth is .02 degrees hotter during a full moon.
157
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
Jupiter's moon Ganymede, is larger than the planet Mercury!
149