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
The light hitting the earth right now is 30 thousand years old.
163
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
NASA invented baby food as we know it today.
7
Sound doesn't travel in space.
255
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15