The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
If two pieces of metal touch in space, they become permanently stuck together.
808
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Pluto is smaller than Russia.
9
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
A comet's tail always points away from the sun.
2
Jupiter is bigger than all the other planets combined.
254