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Talk:Geocentric theory (view source)
Revision as of 18:30, November 3, 2008
, 18:30, November 3, 2008→Jupiter moons: All we know about Ptolemy is what is in his books
:#The term ''coordinates'' was introduced by Leibniz, following the ideas of Descartes. Ptolemy was an excellent mathematician, and we'd say that he described his universe with somewhat like spherical coordinates. So, using the word ''concept'' was to accurate, but that's just me, struggling with the English language.
:#The term ''coordinates'' was introduced by Leibniz, following the ideas of Descartes. Ptolemy was an excellent mathematician, and we'd say that he described his universe with somewhat like spherical coordinates. So, using the word ''concept'' was to accurate, but that's just me, struggling with the English language.
:#Yours is a modern view - untainted by numerology and astrology. Half of Ptolemy's text consider astrological, not astronomical aspects. And it's not about which object is the center, but about how many centers there are. If there are two centers, why not three, four, infinite - and the same is true for two Gods :-) --[[User:BRichtigen|BRichtigen]] 12:45, 3 November 2008 (EST)
:#Yours is a modern view - untainted by numerology and astrology. Half of Ptolemy's text consider astrological, not astronomical aspects. And it's not about which object is the center, but about how many centers there are. If there are two centers, why not three, four, infinite - and the same is true for two Gods :-) --[[User:BRichtigen|BRichtigen]] 12:45, 3 November 2008 (EST)
:: I am not an expert on Ptolemy, so please tell me how I can confirm what you say. Does Ptolemy actually say that the Earth is unmovable? Where? In the Almagest? Is it an essential part of his theory?
:: It may have been natural to rely on Plato and Aristotle, but there were other Greeks who subscribed to a Sun-centered view. Is there some proof that Ptolemy was persuaded by Aristotle's arguments?
:: I realize that Ptolemy wrote a treatise on astrology. But where did he ever say that he thought that it was important that just one object at the center?
:: All we know about Ptolemy is what is in his books. I don't want to attribute some view to him unless it is actually stated in one of his books. [[User:RSchlafly|RSchlafly]] 13:30, 3 November 2008 (EST)