The light hitting the earth right now is 30 thousand years old.
163
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
41% of the moon is not visible from earth at any time.
103
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
Some asteroids have other asteroids orbiting them.
131
Sound doesn't travel in space.
255
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160