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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Jupiter's moon Ganymede, is larger than the planet Mercury!
149
There are two golf balls sitting on the moon.
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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The earth rotates more slowly on its axis in March than in September.
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Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
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