The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
The heart of an astronaut actually gets smaller when in outer space.
216
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
It takes eight and a half minutes for light to get from the sun to earth.
159
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 density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
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
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12