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
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
Pluto is smaller than Russia.
9
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Astronauts get taller when they are in space.
224
Mars had an oxygen-rich atmosphere around 4 billion years ago
13