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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Lightning strikes about 6,000 times per minute on this planet!
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41% of the moon is not visible from earth at any time.
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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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Today's top fuel dragsters take off with more force than the space shuttle.
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Some asteroids have other asteroids orbiting them.
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One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
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An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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