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
A comet's tail always points away from the sun.
2
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
Pluto is smaller than Russia.
9
The heart of an astronaut actually gets smaller when in outer space.
216
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115