There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Summer on Uranus lasts for 21 years.
358
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The heart of an astronaut actually gets smaller when in outer space.
216
The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
4
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
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Earth is the only planet in our solar system that's not named after a god or goddess.
17