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
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Lightning strikes about 6,000 times per minute on this planet!
158