Summer on Uranus lasts for 21 years.
358
Earth is the only planet in our solar system that's not named after a god or goddess.
17
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15