Epicycles: Same Thing By Any Other Name

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Epicycles: Same Thing By Any Other Name
« on: October 18, 2007, 05:31:08 PM »
As far as the accuracy of the imaginary units of measurement known as longitudal lines are concerned, aside from the fact that even modern science has acknowledged their imprecision since the French scientist Marpertuis in the 1700's as demonstrated in his biography

'The Man Who Flattened the Earth' by Mary Terrall
http://www.press.uchicago.edu/cgi-bin/hfs.cgi/00/15365.ctl

I would also emphasize attention on the essence of forms of measurements in order to prevent anyone from being convinced that a theoretical and imaginary measurement be mistaken for reality.  Epicycles are a form of astronomical measurement which is very precise and useful in predicting the exact mathematical trajectories of stars.  However, we all know that stars most definitely do NOT travel in all the lugubrious and multitudinous extra orbital paths along their main path which astronomers have nmone the less used to accurately calculate the timing and position of the various stars.  Stars DO NOT actually physically travel in little miniorbits as they make their principle orbit.

  Therefore, the fact that a measurement is useful and accurate does not at all mean that the measurement itself actually exists.  The same goes for longitudinal lines.

With respect to epicycles, it has many times wrongly and ignorantly been stated that epicycles were discarded with the coming of heliocentrism and Galileo, Newton, et al.  The actual history of astronomy indicates otherwise.  Astronomical ephemerises are published with the explicit statement that the records are made from a geocentric perspective such as those published by ACSand used in University astronomy classes and at observatories.
http://www.astrocom.com/products/book.php?book_id=b106xh

  In spite of UNSUPPORTED propaganda to the contrary, american astronomer Professor Charles Lane Poor indicated in his 1922 book 'Gravitation Versus Relativity' that epicycles were never abandoned and are still used even today.  The actual physical math which modern astronomers use to calculate star movments is not a whit better nor more sophisticated than that used by Claudius Ptolemy in the second century AD although the same science largely ceased to be called epicycles during the height of the Copernican revolt in the 1600's.