Sound doesn't travel in space.
255
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
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
Earth is the only planet in our solar system that's not named after a god or goddess.
17