Lectionary Calendar
Wednesday, January 22nd, 2025
the Second Week after Epiphany
the Second Week after Epiphany
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Bible Encyclopedias
Epicycle
1911 Encyclopedia Britannica
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(Gr. Esri, upon, and icbsXos, circle), in ancient astronomy, a small circle the centre of which describes a larger one. It was especially used to represent geometrically the periodic apparent retrograde motion of the outer planets, Mars, Jupiter and Saturn, which we now know to be due to the annual revolution of the earth around the sun, but which in the Ptolemaic astronomy were taken to be real.
Copyright Statement
These files are public domain.
These files are public domain.
Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Epicycle'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/e/epicycle.html. 1910.
Chisholm, Hugh, General Editor. Entry for 'Epicycle'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/e/epicycle.html. 1910.
