1) Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
2) It takes eight and a half minutes for light to get from the sun to earth.
3) The population of the Earth has more than doubled since 1950.
4) There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
5) Astronauts cannot burp in space.
Lol...love that astronauts can't burp in space! Why can't they??
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