There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Astronauts cannot burp in space.
232
If two pieces of metal touch in space, they become permanently stuck together.
808
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
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
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9