An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Buzz Aldrin’s mother’s maiden name was Moon.
9
There are two golf balls sitting on the moon.
721
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
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
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
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175