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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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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
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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
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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
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prosneusis
‖ prosneusis Astron. (prɒsˈnjuːsɪs) [a. Gr. πρόσνευσις a nodding to, inclination towards; in Ptolemy as in sense a below; f. προσνεύειν to nod to, incline towards.] In the Ptolemaic astronomy: a. prosneusis of the epicycle. A supposed deviation in the axis of the moon's epicycle, assumed as a correc...
Oxford English Dictionary
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Brihaspati
For example, both Khandakhadyaka and Surya Siddhanta of Varaha state that Brihaspati completes 364,220 revolutions every 4,320,000 earth years, an Epicycle 499 CE; while another manuscript of Surya Siddhanta accepts the revolutions to be 364,220, but revises the apogee to 171 degrees and 16 seconds and the Epicycle
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Kevin Tihista
has been released under the eponym, "Kevin Tihista's Red Terror," a musical collaboration between Tihista and brothers Tom and Ellis Clark of the band "Epicycle Tihista also recorded with Epicycle during this period performing harmony vocals on the songs "Crash" and "Big Day" for Epicycle's 2002 album, "Swirl.”
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Stephen Beville
Selected works
Ballade for Eight Players (1997)
Prologue for string Quartet (1998)
Three Piano Pieces (1998)
Epicycle for chamber orchestra (1999-2000) External links
Pianist/Composer website
Review of Beville's 'Epicycle'
Purgatory Pieces/Scenes from Dreams
Concert Details, London New Wind Festival
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فلك التدوير
Galileo Project
توضيحات متحركة
Java simulation of the Ptolemaic System - at Paul Stoddard's Animated Virtual Planetarium, Northern Illinois University
Epicycle An Applet showing the principle of the epicycle, with a side-by-side comparison of the geocentric and heliocentric models.
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Teacups
See also
Ptolemy's epicycle model of the Solar System has been likened by physicists to the spinning-teacups ride.
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Commentariolus
The Moon's sphere, however, revolves around the Earth in a period of one month, and moves with it around the Sun like an epicycle. The ratio which Copernicus took as that for the relative lengths of the small epicycle, large epicycle and deferent is 4:19:180.
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J. Michael Clarke
A CD of four of his works (Refractions, Mälarsång, Epicycle and Uppvaknande) is available under the collective title Refractions (MPSCD003).
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Albert Brudzewski
Although, it is speculated that Copernicus could have encountered such a model, where the primary epicycle carries the center of a second epicycle. This motion means motion of inclination and turning, which corresponds to the single epicycle in Ptolemy's theory of the moon, and the two epicycles in
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