Jupiter's moon Ganymede, is larger than the planet Mercury!
149
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Sound doesn't travel in space.
255
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
The heart of an astronaut actually gets smaller when in outer space.
216
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5