An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Astronauts cannot burp in space.
232
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Pluto is smaller than Russia.
9
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
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
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124