Science
John Glenn was the first American to orbit the earth, in how long a flight?
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The Sun's mass is approximately how many times as great as Earth's?
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Where on the moon did people first land a spacecraft?
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What dust-like particles are only found on plants like ferns, mosses and mushrooms?
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Which electronic component can be classified as NPN or PNP?
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What university did astronomy and space science theorist Carl Sagan teach at?
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What is the irregular and instantaneous motion of air called?
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In which constellation was the first double star observed?
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Which person is known for establishing the laws of motion and gravity?
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