Pluto is smaller than Russia.
9
A comet's tail always points away from the sun.
2
If two pieces of metal touch in space, they become permanently stuck together.
808
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
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