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 volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Sound doesn't travel in space.
255
The earth is .02 degrees hotter during a full moon.
157
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
41% of the moon is not visible from earth at any time.
103
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