Sound doesn't travel in space.
255
It would take more than 150 years to drive a car to the sun.
569
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Jupiter is bigger than all the other planets combined.
254
The light hitting the earth right now is 30 thousand years old.
163
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14