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
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Venus is the only planet that rotates clockwise.
310
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
More than 20 million meteoroids enter Earth's atmosphere every day.
139
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
Today's top fuel dragsters take off with more force than the space shuttle.
120