Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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Astronauts get taller when they are in space.
224
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
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
The sun is 330,330 times larger than the earth!
190
Sound doesn't travel in space.
255
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