A comet's tail always points away from the sun.
2
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
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
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 last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10