Summer on Uranus lasts for 21 years.
358
It would take more than 150 years to drive a car to the sun.
569
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
41% of the moon is not visible from earth at any time.
103
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
Jupiter is bigger than all the other planets combined.
254
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9