Science

John Glenn was the first American to orbit the earth, in how long a flight?

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Pressure exerted by the atmosphere at a given point is known as what?
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What university did astronomy and space science theorist Carl Sagan teach at?
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What powered the Bersey Cab?
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How many years does it take for Mars to go around the Sun for a complete revolution in its orbit?
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How fast does the earth travel through space?
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What is the unit of measure called clo for?
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In which constellation does the vernal equinox appear?
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What tool uses a magnetic needle that points north?
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