41% of the moon is not visible from earth at any time.
103
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Sound doesn't travel in space.
255
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
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
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Summer on Uranus lasts for 21 years.
358