There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The light hitting the earth right now is 30 thousand years old.
163
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Jupiter is bigger than all the other planets combined.
254
It 'snows' metal on Venus.
13
The earth rotates more slowly on its axis in March than in September.
145
The heart of an astronaut actually gets smaller when in outer space.
216