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How long does it take to read Ptolemy's Almagest?

Ptolemy

Ptolemy's Almagest by Ptolemy takes about 16 hours 18 minutes to read at 250 words a minute.

About 16 hours 18 minutes

A long haul

First published 1948. 889 pages, about 244,475 words.

33 days (about 5 weeks) at 30 minutes a day

Estimate based on 275 words per page.

At other speeds

Slow, 150 words a minute 27 hours 10 minutes
Average, 250 words a minute 16 hours 18 minutes
Fast, 400 words a minute 10 hours 11 minutes

The page count is the median across 13 editions, so your copy may differ. How we calculate.

About the book

Ptolemy's Almagest is one of the most influential scientific works in history. A masterpiece of technical exposition, it was the basic textbook of astronomy for more than a thousand years, and still is the main source for our knowledge of ancient astronomy. This translation, based on the standard Greek text of Heiberg, makes the work accessible to English readers in an intelligible and reliable form. It contains numerous corrections derived from medieval Arabic translations and extensive footnotes that take account of the great progress in understanding the work made in this century, due to the discovery of Babylonian records and other researches. It is designed to stand by itself as an interpretation of the original, but it will also be useful as an aid to reading the Greek text.

Subjects: Addresses, essays, lectures, Astronomy, Greek Mathematics, Stars, Catalogs

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