The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
Sound doesn't travel in space.
255
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
The light hitting the earth right now is 30 thousand years old.
163
Jupiter is bigger than all the other planets combined.
254
Mars had an oxygen-rich atmosphere around 4 billion years ago
13