Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Astronauts cannot burp in space.
232
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
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115