# Where did Ptolemy compare the Earth to the distance of fixed stars?

I read the following in C. S. Lewis, Miracles (page 77-8)

The immensity of the universe is not a recent discovery. More than seventeen hundred years ago Ptolemy taught that in relation to the distance of the fixed stars the whole Earth must be regarded as a point with no magnitude.

There was no reference given, but I assume this would be in the Almagest. However, I don't know where in that work (or elsewhere) Ptolemy discussed this. I want to read his explanation for that view.

Hence the question: Where did Ptolemy compare the Earth to the distance of fixed stars?

Almagest, Book 1, chap. 5 contains what you are looking for.

• This basically answered my question where in the Almagest I need to look. – Frank Hubeny Apr 21 at 22:54