If two pieces of metal touch in space, they become permanently stuck together.
808
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
Sound doesn't travel in space.
255
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
The light hitting the earth right now is 30 thousand years old.
163