An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Sound doesn't travel in space.
255
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15