If two pieces of metal touch in space, they become permanently stuck together.
808
Pluto is smaller than Russia.
9
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
A comet's tail always points away from the sun.
2
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10