If two pieces of metal touch in space, they become permanently stuck together.
808
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
The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
4
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
Summer on Uranus lasts for 21 years.
358
Mars had an oxygen-rich atmosphere around 4 billion years ago
13