Jupiter is bigger than all the other planets combined.
254
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
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
The earth is .02 degrees hotter during a full moon.
157
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
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 puts out more power in 1 second than mankind has ever used within human existence.
14
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124