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Deferent and epicycle - Wikipedia
The epicycles of the planets in orbit around Earth (Earth at the center). The path-line is the combined motion of the planet's orbit (deferent) around Earth and ...
en.wikipedia.org
en.wikipedia.org
EPICYCLE Definition & Meaning - Merriam-Webster
1. in Ptolemaic astronomy : a circle in which a planet moves and which has a center that is itself carried around at the same time on the circumference of a ...
www.merriam-webster.com
www.merriam-webster.com
Epicycles – Circles and Pi - Mathigon
Epicycles to their model of the solar system: planets move on a large circle around Earth, while simultaneously rotating on a smaller circle.
mathigon.org
mathigon.org
epicycle
▪ I. epicycle, n. (ˈɛpɪsaɪk(ə)l) Forms: (4 episicle, 5 epicikle, epycikle), 6–7 epicicle, (7 epycycle), 7– epicycle. [ad. L. epicyclus, a. Gr. ἐπίκυκλος, f. ἐπί upon + κύκλος circle.] 1. A small circle, having its centre on the circumference of a greater circle. Chiefly Astron. In the Ptolemaic syst...
Oxford English Dictionary
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epicycle - Wiktionary, the free dictionary
(geometry) Any circle whose circumference rolls around that of another circle, thus creating a hypocycloid or epicycloid. (organic chemistry) A ring of atoms ...
en.wiktionary.org
en.wiktionary.org
Epicycle | astronomy - Britannica
In the Ptolemaic system each planet revolves uniformly along a circular path (epicycle), the centre of which revolves around Earth along a larger circular path ...
www.britannica.com
www.britannica.com
Deferent and epicycle
This could not have been accomplished with deferent/epicycle methods. If is the path of an epicycle, then the deferent plus epicycle is represented as the sum
This is an almost periodic function, and is a periodic function
wikipedia.org
en.wikipedia.org
Ptolemaic Epicycle Machine
Ptolemy explained the apparent "looping motion" of the planets by placing the center of one rotating circle, called the epicycle, which carried the planet, on ...
sciencedemonstrations.fas.harvard.edu
sciencedemonstrations.fas.harvard.edu
Epicycles | Azimuth - WordPress.com
The epicycle makes up for how in reality the Earth is not actually stationary, but moving around the Sun.
johncarlosbaez.wordpress.com
johncarlosbaez.wordpress.com
Planets & epicycles (article) - Khan Academy
This cyclical variation could be represented visually by mini orbits, or epicycles, revolving around larger circular orbits, or deferents.
www.khanacademy.org
www.khanacademy.org
EPICYCLE Definition & Meaning - Dictionary.com
Epicycle definition: a small circle the center of which moves around in the circumference of a larger circle: used in Ptolemaic astronomy to account for ...
www.dictionary.com
www.dictionary.com
epicycloid
epicycloid (ɛpɪˈsaɪklɔɪd) [f. epicycle + -oid.] A curve generated by a point in the circumference of a moveable circle, which revolves on that of a fixed circle; in accurate phraseology the term is now limited to the case in which the moveable circle rolls on the exterior of the other (formerly exte...
Oxford English Dictionary
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Gyða Valtýsdóttir
Gyða's first solo album, Epicycle, was released worldwide in 2017, winning Album of the Year at the Iceland Music Awards and Kraumur Music Award. Discography
Solo albums
2013 Serenade Vapour 7”
2016 Epicycle
2018 Evolution
2018 MIKHEL (soundtrack)
2020 Epicycle II
2021 Ox
Albums with múm
wikipedia.org
en.wikipedia.org
centric
centric, a. (ˈsɛntrɪk) [mod. ad. Gr. κεντρικ-ός pertaining to the centre, f. κέντρον: see centrum.] 1. That is in or at the centre, central.c 1590 Marlowe Faustus vi, The substance of this centric earth. 1594 1st Pt. Contention iv. 18 To pierce the bowels of this Centricke earth. a 1631 Donne Poems ...
Oxford English Dictionary
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Al-Zarqali
, al-Zarqālī noted that the path of the center of the primary epicycle is not a circle, as it is for the other planets. Some writers have misinterpreted al-Zarqālī's description of an earth-centered oval path for the center of the planet's epicycle as an anticipation of
wikipedia.org
en.wikipedia.org