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linear function of the angle of the deferent. In the Hipparchian system the epicycle rotated and revolved along the deferent with uniform motion. However, Ptolemy...

large • ), is placed so that it is directly opposite to Earth from the deferent's center, known as the eccentric (represented by the × ). A planet or the...

is moved by a system of two spheres: one called its deferent; the other, its epicycle. The deferent is a circle whose center point, called the eccentric...

The vas deferens (pl.: vasa deferentia), with the more modern name ductus deferens (pl.: ductūs deferentes), is part of the male reproductive system of...

sphere/slice is the deferent, with a centre offset somewhat from the Earth; the other sphere/slice is an epicycle embedded in the deferent, with the planet...

epididymis 3: Lobules of epididymis 4: Body of epididymis 5: Tail of epididymis 6: Duct of epididymis 7: Deferent duct (ductus deferens or vas deferens)...

University Animation of Ptolemy's two Solar hypotheses on YouTube Epicycle and deferent demo – at Rosemary Kennett's website at Syracuse University Flash animation...

view, such as the apparent retrograde motion of the planets, a system of deferents and epicycles was used. The planet was said to revolve in a small circle...

smaller circle is called a deferent. The motion of the body rotate around the circle of the deferent, meanwhile the deferent itself would be rotating around...

astronomer Abū Ishāq Ibrāhīm al-Zarqālī in the 11th century described the deferent of Mercury's geocentric orbit as being oval, like an egg or a pignon, although...

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...

BCE, retrograde motion was explained by having the planets travel in deferents and epicycles. It was not understood to be an illusion until the time...

center that moved in a larger circular orbit (called an eccentric or a deferent) around a center-point near Earth. The use of equants added another level...

correspond to theories of dark energy. Ad hoc Fringe science Russell's teapot Deferent and epicycle § Bad science No true Scotsman Special pleading The Structure...

astronomic model to be replaced with an equivalent epicycle that moved around a deferent centered at half the distance to the equant point. Maragheh observatory...

Al-Zarqālī's model for the motion of the Sun, in which the center of the Sun's deferent moved on a small, slowly rotating circle to reproduce the observed motion...

smaller spheres. Ptolemy's system employed devices, including epicycles, deferents and equants, to account for observations that the paths of these bodies...

Claudius Ptolemaeus constructed a geocentric planetary model based on deferents and epicycles to explain Jupiter's motion relative to Earth, giving its...

United States, along with the provinces of Argentina, Canada and Pakistan, deferent to the modern definition of the word. Albeit China and Iran are legally...

accurately represented by means of techniques involving the use of epicycles, deferents, eccentrics (whereby planetary motion is conceived as circular with respect...