Ptolemy’s Circumference of the Earth
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A Mixture of Ancient and Modern Understanding Concerning the Distance and Motion of the Moon
Ptolemy’s model of the Moon’s motion implied that its distance varies by nearly a factor of two, implying that its angular size should also vary by nearly a factor of two. We present an analysis of 100 naked eye observations of the Moon’s angular size obtained over 1145 days, showing regular variations of at least 3. Thus, ancient astronomers could have shown that a key implication of Ptolemy’s...
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تاریخ انتشار 2014