Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Sound doesn't travel in space.
255
Astronauts cannot burp in space.
232
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
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