Jupiter is bigger than all the other planets combined.
254
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
If two pieces of metal touch in space, they become permanently stuck together.
808
Pluto is smaller than Russia.
9
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
Sound doesn't travel in space.
255