The gradual acceptance of the Copernican theory of the universeNote 17 — Chapter I · The Development of Astronomical Thought to 1400 A.D. A Preliminary Sketch of Early Theories as a Background.Reading editionPlutarch: De Facie in Orbe Lunæ, (V, 410).◇Copy noteReturn to CHAPTER I. The Development of Astronomical Thought to 1400 A.D. A Preliminary Sketch of Early Theories as a Background.