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
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Sound doesn't travel in space.
255
If two pieces of metal touch in space, they become permanently stuck together.
808
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
41% of the moon is not visible from earth at any time.
103
Some asteroids have other asteroids orbiting them.
131