In the ancient astronomy, the epicycle was a small circle supposed to move round the circumference of a larger, a hypothetical mode of representing the apparent motion of the planets, which were supposed to have such a motion round the circumference of a large circle, called the deferent, having the earth in its centre.
www.probertencyclopaedia.com/cgi-bin/res.pl?keyword=Epi... www.probertencyclopaedia.com/cgi-bin/res.pl?keyword=Epicycle&offset=0
In the first place, if one affirms as true the existence of an epicycle revolving round a certain sphere, In addition to this impossibility necessarily following from the assumption of the existence of epicycles, he sets forth there other impossibilities that also follow from that assumption. I shall explain them to you now.
homepages.wmich.edu/~mcgrew/maimonides.htm
What is epicycle motion? Why were epicycles needed? What led the idea of the epicycle? Explain the purpose of an epicycle? What is an epicycle supposed to explain? In the ptolemaic model of the universe the? Why was the ptolemaic model used for so long?
wiki.answers.com/Q/What_was_the_purpose_of_the_epicycle... wiki.answers.com/Q/What_was_the_purpose_of_the_epicycle_in_the_Ptolemaic_model
There are example questions given below. A grade will not be recorded for this quiz. ... 8. What is an epicycle supposed to explain?; Solar eclipses. Seasons. Phases of the Moon. Retrograde motion of the planets; Precession.
www.physics.sfasu.edu/astro/courses/ast105/onlinequiz1.... www.physics.sfasu.edu/astro/courses/ast105/onlinequiz1.htm
Orbit - Wikipedia, the free encyclopedia
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In physics, an orbit is the gravitationally curved path of one object around a point or another body, for example the gravitational orbit of a planet around a star. Historically, the apparent motion...
en.wikipedia.org/wiki/Orbit
As a planet moves around on its epicycle, the center of the epicycle (called the ``deferent'') moves around the Earth. When its motion brings it inside the deferent circle, the planet undergoes retrograde motion. ... Back to Ptolemy's geocentric universe...
www.astronomynotes.com/history/epicycle.htm www.astronomynotes.com/history/epicycle.htm
First Midterm Exam ... a. Write and fill in the bubbles for your 9-digit ID number. Leave the last (10th) space blank. ... O. What was an "epicycle" supposed to explain?
planet.fhda.edu/DACAstr/Harr10s/10MT1W08.htm
Reading Overview for Exam 1 ... Astronomy 4 and 10 ... Epicycle (what was it supposed to explain?)
planet.fhda.edu/DACAstr/RdgOvwEx1.htm
In the geocentric model of the solar system, mechanisms such as the deferent and epicycle were supposed to explain the motion of the planets in terms of perfect spheres or rings.
tinywiki.org/orbit.html
Don’t say that it’s obvious—although investment cycles clearly are associated with economywide recessions and recoveries in practice, a theory is supposed to explain observed correlations, not just assume them.
blog.intelligentinvestor.com.au/bristlemouth/the-great-... blog.intelligentinvestor.com.au/bristlemouth/the-great-monetary-ponzi-scheme/