Re: Starmapping software


"oriel36" <geraldkelleher@xxxxxxxxx> wrote in message
news:1160737628.593742.273200@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


That planetary motion is seen directly from Earth is a wonderful
experience that really can only be appreciated by going outside and
looking out on the other planets.

Newton could not even get that right and adopted a view that has
nothing to do with either Ptolemaic or Copernican heliocentricity and
how to reason the observed motions of the planets -

"For to the earth planetary motions appear sometimes direct, sometimes
stationary, nay, and sometimes retrograde. But from the sun they are
always seen direct.." Newton

briefly explain what is wrong with that statement.

'Direct' and 'Retrograde' have specific meanings here and it is clear that
he is referring to the appearance from Earth.



.

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