Timeline for Did Archimedes use epicycles in his planetarium?
Current License: CC BY-SA 3.0
21 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S May 13, 2020 at 18:58 | history | suggested | Rodrigo de Azevedo |
added tag.
|
|
| May 13, 2020 at 13:17 | review | Suggested edits | |||
| S May 13, 2020 at 18:58 | |||||
| Nov 24, 2014 at 21:32 | vote | accept | Conifold | ||
| Nov 20, 2014 at 12:59 | answer | added | Alexandre Eremenko | timeline score: 3 | |
| Nov 20, 2014 at 1:55 | comment | added | Alexandre Eremenko | @Conifold: Yes, it is strange that they gave this thing to some engineer (not a team of professional archeologists), and there is nothing except his book describing it. I could not find on the Internet a single photo of the object, and ALL mentionings of this object refer only on this engineer. | |
| Nov 20, 2014 at 1:28 | comment | added | Conifold | @Alexandre Eremenko If I understand it correctly, all authors are retransmitting Almagest XII,1, and there is a possibility that Apollonius was "corrected" from Apolinarius by a late copier. Olbia is a bit fishy but who knows. I was hoping that there would be either a classicist on the site who could comment on it, or an engineer who could assess the plausibility of a homocentric contraption with gears. Or both :) | |
| Nov 20, 2014 at 1:13 | comment | added | Alexandre Eremenko | @fgb: You are right: the idea is credited to him by most authors. However, from what I read by Apollonius I conclude that he was a pure mathematician, not an astronomer, and I conclude that he could only proposed an idea, and did not elaborate a "system" describing the motions quantitatively. | |
| Nov 20, 2014 at 1:09 | comment | added | Alexandre Eremenko | @Conifold: Yes, I "changed my mind" after some search on the Internet:-) It is a strange ans suspicious story about Olbia find. And there is no real evidence about Archimedes and epicycles. | |
| Nov 19, 2014 at 20:11 | comment | added | fdb | @AlexandreEremenko. The "common view" is that epicycles were invented by Apollonius, about half a century before Hipparchus. | |
| S Nov 18, 2014 at 21:39 | history | suggested | Danu♦ |
tags edited
|
|
| Nov 18, 2014 at 21:30 | review | Suggested edits | |||
| S Nov 18, 2014 at 21:39 | |||||
| Nov 18, 2014 at 3:45 | comment | added | Conifold | You change your mind quickly :) This is a question, I am not trying to assess the evidence myself. But Ptolemy ascribes theorems about stationary points of retrogressions to Apollonius, which is a priori strange even without Olbia if no one actually applied the model to planets before Apollonius, let alone Hipparchus. It's like Laplace proving all those celestial stability theorems before anyone thought that inverse square law applies to planets. | |
| Nov 18, 2014 at 3:14 | comment | added | Alexandre Eremenko | The common view is that epicycle model is due to Hipparchus. From your links I see absolutely no evidence that this common view should be revised. Cicero, like other Romans did not understand anything in astronomy, and his description cannot be taken seriously, especially when he says about Solar eclipses modeling:-) | |
| Nov 18, 2014 at 3:10 | comment | added | Alexandre Eremenko | I checked your links, and found only this book in Greek, which is apparently based on a single piece of one toothwheel found in Olbia. No photo on Internet, no journal publications. What is the other evidence that epicycle model was known to Archimedes? What is the evidence relating this toothwheel to Archimedes ? Or to any planetarium? | |
| Nov 18, 2014 at 3:03 | comment | added | Conifold | If he did use epicycles it would be quite a revision of conventional history, but I am not convinced that it's "probable" if gears can be used in a homocentric contraption also. Planetarium was known long before Antikythera, so someone might have thought of one. I am also interested if these finds change the assessment of the reliability of Ptolemy's attributions by classical scholars, and if they would consider the alternative more likely than the conventional version now. Of course the latter answer depends on the former. | |
| Nov 18, 2014 at 3:02 | comment | added | Conifold | I think it's a single gear, and it took them from 2006 to 2011 to present findings publicly. Geymonat's book may have details, but I haven't seen it first hand. | |
| Nov 18, 2014 at 2:42 | comment | added | Alexandre Eremenko | Your post contains very interesting information, but I do not see how can one possibly give a definite answer to your question. Probably he used epicycles (modeled by toothwheels). What else ? On what other principle such a mechanical device can be made? | |
| Nov 18, 2014 at 2:37 | comment | added | Alexandre Eremenko | Do you know where to find more details of this newly found mechanism from Olbia? Pictures, description etc.? Folowing your link I could not find any details. | |
| Nov 18, 2014 at 1:47 | comment | added | HDE 226868♦ | As per (unofficial) policy, we're not going scientist tags. . . (Sigh) | |
| Nov 18, 2014 at 1:47 | history | edited | HDE 226868♦ |
edited tags
|
|
| Nov 18, 2014 at 1:29 | history | asked | Conifold | CC BY-SA 3.0 |