the epicycle is not a linear function of the angle of the deferent. In the Hipparchian system the epicycle rotated and revolved along the deferent with...
35 KB (4,567 words) - 02:33, 16 May 2024
backward in retrograde motion, and then again reversed to resume normal, or prograde, motion. The deferent-and-epicycle model had been used by Greek astronomers...
75 KB (8,814 words) - 06:07, 28 May 2024
Apparent retrograde motion (redirect from Apparent retrograde and direct motion)
retrograde motion was explained by having the planets travel in deferents and epicycles. It was not understood to be an illusion until the time of Copernicus...
12 KB (1,566 words) - 12:16, 29 April 2024
Epicycloid (section Area and Arc Length)
{R+r}{r}}\theta \right)} List of periodic functions Cycloid Cyclogon Deferent and epicycle Epicyclic gearing Epitrochoid Hypocycloid Hypotrochoid Multibrot...
7 KB (964 words) - 07:02, 30 May 2024
Greek concepts of deferent and epicycle in the Ptolemaic system of astronomy were related to Fourier series (see Deferent and epicycle § Mathematical formalism)...
37 KB (4,733 words) - 18:28, 14 May 2024
Equant (section Discovery and use)
opposite to Earth from the deferent's center, known as the eccentric (represented by the × ). A planet or the center of an epicycle (a smaller circle carrying...
15 KB (2,066 words) - 14:40, 4 October 2023
theory of eccentrics and epicycles (and their deferents). This was further elaborated on by Hipparchus in the second century BC and, later, by Ptolemy in...
33 KB (4,138 words) - 08:38, 30 May 2024
of the planets, a system of deferents and epicycles was used. The planet was said to revolve in a small circle (the epicycle) about a center, which itself...
39 KB (4,778 words) - 21:00, 31 May 2024
Russell's teapot Deferent and epicycle § Bad science No true Scotsman Special pleading The Structure of Scientific Revolutions Proofs and Refutations "The...
3 KB (293 words) - 22:53, 27 May 2024
Almagest (section Journals and magazines)
Apollonius of Perga (c. 262 – c. 190 BC) had introduced the deferent and epicycle and the eccentric deferent to astronomy. Hipparchus (2nd century BC) had crafted...
43 KB (4,790 words) - 10:28, 21 March 2024