Science
Energy return of a radar signal after it has hit the target best fits which science term?
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Which Apollo mission were Edward White and Gus Grissom selected for?
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How many tons of meteor dust fall to Earth every day?
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When did Panama move from South America to North America?
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John Glenn was the first American to orbit the earth, in how long a flight?
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What satellite series was known as "fellow traveler"?
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What university did astronomy and space science theorist Carl Sagan teach at?
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What is a spacecraft that orbits planets, moons or other large space objects called?
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