Some asteroids have other asteroids orbiting them.
131
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Sound doesn't travel in space.
255
Pluto is smaller than Russia.
9
The Earth gets 100 tons heavier every day due to falling space dust.
673
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