Sound doesn't travel in space.
255
Jupiter is bigger than all the other planets combined.
254
Some asteroids have other asteroids orbiting them.
131
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 moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The earth rotates more slowly on its axis in March than in September.
145