carolb Wrote:
>
> Well, let's face it - he didn't have the
> instruments that modern scientists have, to make
> precise measurements. He simply made mistakes,
> just as he made mistakes with geocentrism and
> epicycles.
>
> Carol

"Mistake" ?

The struggle, so violent in the early days of science, between the views of Ptolemy and Copernicus would then be quite meaningless. Either CS [Coordinate System] could be used with equal justification.
The two sentences, 'the sun is at rest and the earth moves,' or 'the sun moves and the earth is at rest,' would simply mean two different conventions concerning two different CS.

Albert Einstein