The heart of an astronaut actually gets smaller when in outer space.
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There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
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The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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Pluto is smaller than Russia.
9
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
Lightning strikes about 6,000 times per minute on this planet!
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