+The *Almagest* is a monumental second-century astronomical treatise by [Ptolemy](/wiki/Ptolemy). It systemized Greek knowledge of the cosmos, establishing a sophisticated [Geocentrism](/wiki/Geocentrism) that guided celestial understanding for over 1400 years.
+## See also
+- [Astronomy](/wiki/Astronomy)
+- [Cosmology](/wiki/Cosmology)
+- [Star Catalog](/wiki/Star_Catalog)
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