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
Sound doesn't travel in space.
255
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
The earth rotates more slowly on its axis in March than in September.
145
A comet's tail always points away from the sun.
2
The heart of an astronaut actually gets smaller when in outer space.
216
Jupiter is bigger than all the other planets combined.
254
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115