An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Earth is the only planet in our solar system that's not named after a god or goddess.
17
The heart of an astronaut actually gets smaller when in outer space.
216
Venus is the only planet that rotates clockwise.
310
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
