If two pieces of metal touch in space, they become permanently stuck together.
808
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
Buzz Aldrin’s mother’s maiden name was Moon.
9
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
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
The light hitting the earth right now is 30 thousand years old.
163
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
41% of the moon is not visible from earth at any time.
103