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How did Eratosthenes determine that Alexandria and Syene were on the same meridian?

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How did Scott and Amundsen detect the South Pole?

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What laser technology/ies were first used to bounce off of the Apollo 11 retroreflectors to accurately measure distance to the Moon?

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How did the earliest measurements of lasers bounced off of Apollo 11 retroreflectors deal with the light from the Moon and pick out single photons?

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Did the ancients know about the law of universal gravitation?

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Why was China slow to recognise the sphericity of Earth?

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Kepler's Mysterium Cosmographicum with regular polygons: in which nesting order?

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Is there an astronomical reason behind the order for the names of days of the week?

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Who determined the temperature of the Sun first?

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Ancient parallax

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What happened to the data from the survey that discovered the first pulsars?

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Did the Ptolemaic system have rotating center of the deferent for Venus?

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Could ancient astronomers have proven heliocentrism?

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Entry 97 in Gauss's diary and the status of "lunar parallax" in the late 18th century

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