A Non-Aristotelian Interpretation of Orbs in the Post-Classical Islamic Age: Shams al-Dın al-Samarqandı in Science of the Cosmos and the Soul

The history of Islamic astronomy falls under the influence of Aristotelian cosmology, in which orbs have a principal role in holding and moving the planets. Based on the prevalent accepted Aristotelian idea, these orbs are spherical shells that rotate around their center and are made of a particular...

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Main Authors: Hanif Ghalandari, Hassan Amini
Format: Article
Language:English
Published: Scientific Studies Association (ILEM) 2022-10-01
Series:Nazariyat: Journal for the History of Islamic Philosophy and Sciences
Subjects:
Online Access:https://nazariyat.org/content/5-sayilar/17-cilt-8-sayi-2/5-hanif-ghalandari-hassan-amini-o-gunes/5_hanif_ghalandari_hassan_amini_en.pdf
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author Hanif Ghalandari
Hassan Amini
author_facet Hanif Ghalandari
Hassan Amini
author_sort Hanif Ghalandari
collection DOAJ
description The history of Islamic astronomy falls under the influence of Aristotelian cosmology, in which orbs have a principal role in holding and moving the planets. Based on the prevalent accepted Aristotelian idea, these orbs are spherical shells that rotate around their center and are made of a particular substance called aether. No lightness or heaviness, rarefaction or condensation, and generation or corruption exist in the aether-filled heavens. Subsequently, any tearing or mending of these orbs is impossible. This assumption leads to a basic rule: the planets do not move in an orb but by an orb. During the medieval Islamic age, new models emerged for solving some of the anomalies in Ptolemaic astronomy; however, the assumption above was rarely disputed. This paper will introduce an unordinary case based on the book Science of the Cosmos and the Soul by Shams al-Dīn al-Samarqandī in which, besides the standard Ptolemaic system, some alternative models were briefly presented: in these new models, the tearing or mending of these orbs is possible. Considering that this assumption conflicts with Aristotelian physics, these models can be regarded as non-Aristotelian.
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spelling doaj.art-9d85a2186c974928bcf0c671388361482023-02-22T14:15:24ZengScientific Studies Association (ILEM)Nazariyat: Journal for the History of Islamic Philosophy and Sciences2547-94152022-10-0182129144doi.org/10.12658/Nazariyat.8.2.M0188enA Non-Aristotelian Interpretation of Orbs in the Post-Classical Islamic Age: Shams al-Dın al-Samarqandı in Science of the Cosmos and the SoulHanif Ghalandari0https://orcid.org/0000-0002-4307-5809Hassan Amini1https://orcid.org/0000-0003-4849-8269University of TehranUniversity of TehranThe history of Islamic astronomy falls under the influence of Aristotelian cosmology, in which orbs have a principal role in holding and moving the planets. Based on the prevalent accepted Aristotelian idea, these orbs are spherical shells that rotate around their center and are made of a particular substance called aether. No lightness or heaviness, rarefaction or condensation, and generation or corruption exist in the aether-filled heavens. Subsequently, any tearing or mending of these orbs is impossible. This assumption leads to a basic rule: the planets do not move in an orb but by an orb. During the medieval Islamic age, new models emerged for solving some of the anomalies in Ptolemaic astronomy; however, the assumption above was rarely disputed. This paper will introduce an unordinary case based on the book Science of the Cosmos and the Soul by Shams al-Dīn al-Samarqandī in which, besides the standard Ptolemaic system, some alternative models were briefly presented: in these new models, the tearing or mending of these orbs is possible. Considering that this assumption conflicts with Aristotelian physics, these models can be regarded as non-Aristotelian.https://nazariyat.org/content/5-sayilar/17-cilt-8-sayi-2/5-hanif-ghalandari-hassan-amini-o-gunes/5_hanif_ghalandari_hassan_amini_en.pdfshams al-dīn al-samarqandīscience of the cosmos and the soulpost-classical islamic astronomynon-aristotelian physicsplanetary modelsptolemaic astronomy
spellingShingle Hanif Ghalandari
Hassan Amini
A Non-Aristotelian Interpretation of Orbs in the Post-Classical Islamic Age: Shams al-Dın al-Samarqandı in Science of the Cosmos and the Soul
Nazariyat: Journal for the History of Islamic Philosophy and Sciences
shams al-dīn al-samarqandī
science of the cosmos and the soul
post-classical islamic astronomy
non-aristotelian physics
planetary models
ptolemaic astronomy
title A Non-Aristotelian Interpretation of Orbs in the Post-Classical Islamic Age: Shams al-Dın al-Samarqandı in Science of the Cosmos and the Soul
title_full A Non-Aristotelian Interpretation of Orbs in the Post-Classical Islamic Age: Shams al-Dın al-Samarqandı in Science of the Cosmos and the Soul
title_fullStr A Non-Aristotelian Interpretation of Orbs in the Post-Classical Islamic Age: Shams al-Dın al-Samarqandı in Science of the Cosmos and the Soul
title_full_unstemmed A Non-Aristotelian Interpretation of Orbs in the Post-Classical Islamic Age: Shams al-Dın al-Samarqandı in Science of the Cosmos and the Soul
title_short A Non-Aristotelian Interpretation of Orbs in the Post-Classical Islamic Age: Shams al-Dın al-Samarqandı in Science of the Cosmos and the Soul
title_sort non aristotelian interpretation of orbs in the post classical islamic age shams al din al samarqandi in science of the cosmos and the soul
topic shams al-dīn al-samarqandī
science of the cosmos and the soul
post-classical islamic astronomy
non-aristotelian physics
planetary models
ptolemaic astronomy
url https://nazariyat.org/content/5-sayilar/17-cilt-8-sayi-2/5-hanif-ghalandari-hassan-amini-o-gunes/5_hanif_ghalandari_hassan_amini_en.pdf
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AT hanifghalandari nonaristotelianinterpretationoforbsinthepostclassicalislamicageshamsaldınalsamarqandıinscienceofthecosmosandthesoul
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