Mars had an oxygen-rich atmosphere around 4 billion years ago
13
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The heart of an astronaut actually gets smaller when in outer space.
216
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
In outer space there exists a gigantic cloud of alcohol which can be used to produce 400 trillion trillion pints of beer.
31
Pluto is smaller than Russia.
9