Sound doesn't travel in space.
255
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
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
If two pieces of metal touch in space, they become permanently stuck together.
808