Summer on Uranus lasts for 21 years.
358
Jupiter is bigger than all the other planets combined.
254
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
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
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12