Summer on Uranus lasts for 21 years.
358
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Astronauts cannot burp in space.
232
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
It takes eight and a half minutes for light to get from the sun to earth.
159
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
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