Science
How many years are in a sunspot cycle?
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How many tons of meteor dust fall to Earth every day?
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What is the world's largest non-profit, scientific and educational organization?
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According to Ohm's Law, what would the resistance be in a circuit with 40 volts and 8 amps?
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What is it called when the Earth, Sun and Moon lie in a straight-line configuration?
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The obscuring from sight of one celestial body by another is also by what scientific term?
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Ian Shelton, who discovered Supernova 1987A, while observing in Chile, was working for what university?
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