Summer on Uranus lasts for 21 years.
358
Jupiter is bigger than all the other planets combined.
254
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
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
It 'snows' metal on Venus.
13