Sound doesn't travel in space.
255
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Summer on Uranus lasts for 21 years.
358
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
If two pieces of metal touch in space, they become permanently stuck together.
808
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236