Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
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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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Only 55% of Americans know that the sun is a star.
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Jupiter's moon Ganymede, is larger than the planet Mercury!
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More than 20 million meteoroids enter Earth's atmosphere every day.
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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.
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