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Geminus
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<p>Geminus of <a href="/facts/Rhodes/07LazWIX">Rhodes</a> , was a <a href="/facts/Ancient_Greece/PTVBrWXq">Greek</a> <a href="/facts/Astronomer/ronF8j4a">astronomer</a> and <a href="/facts/Mathematician/eaFSR8Fx">mathematician</a>, who flourished in the 1st century BC. An <a href="/facts/Astronomy/0ArJVM1p">astronomy</a> work of his, the <i>Introduction to the Phenomena</i>, still survives; it was intended as an introductory astronomy book for students. He also wrote a work on <a href="/facts/Mathematics/pxTouaz4">mathematics</a>, of which only fragments quoted by later authors survive. </p>