The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
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
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Buzz Aldrin’s mother’s maiden name was Moon.
9
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The earth rotates more slowly on its axis in March than in September.
145