Science

Who discovered the supernova and was the first to theorize that stars "die"?

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What are plants that grow, flower, make seeds and die in one year?
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What is the main form of energy produced by a laser?
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Who discovered the rotating magnetic field that is the basis of Alternating Current?
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What vascular plants do not have seed-bearing flowers or fruits?
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What are the "Big Dipper" and "Orion" examples of in the night sky?
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A unit for measuring pressure is also known as what?
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Which of these is not a Galilean satellite?
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What is the waxy covering on plant leaves?
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