The heart of an astronaut actually gets smaller when in outer space.
216
Astronauts cannot burp in space.
232
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The sun is 330,330 times larger than the earth!
190
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Earth is the only planet in our solar system that's not named after a god or goddess.
17
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219