There are two golf balls sitting on the moon.
721
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
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
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
Lightning strikes about 6,000 times per minute on this planet!
158
The earth travels through space at 660,000 miles per hour.
189
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4