The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Some asteroids have other asteroids orbiting them.
131
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
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 Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88