Geosentrisme: Perbedaan antara revisi

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{{Redirect|Geosentrik|orbit yang mengitari Bumi|Orbit Geosentrik}}
 
[[Berkas:Bartolomeu Velho 1568.jpg|jmpl|ka|300px|'''Figure of the heavenly bodies''' (Gambar benda-benda langit) — suatu illustrasi sistem geosentrik of Ptolemeus karya kosmografer dan kartografer Portugis [[Bartolomeu Velho]], 1568 (Bibliothèque Nationale, Paris)]]
 
'''Geosentrisme''' atau disebut '''Teori Geosentrik''', '''Model Geosentrik''' (bahasa Inggris: '''geocentric model''' atau '''geocentrism''', '''Ptolemaic system''') adalah istilah [[astronomi]] yang menggambarkan alam semesta dengan [[bumi]] sebagai pusatnya dan pusat pergerakan semua benda-benda langit. Model ini menjadi sistem kosmologi predominan pada budaya kuno misalnya [[Yunani kuno]], yang meliputi sistem-sistem terkenal yang dikemukakan oleh [[Aristoteles]] anddan [[Claudius Ptolemaeus]].<ref name="Lawson2004"/>
 
Dua pengamatan umum mendukung pandangan bahwa Bumi adalah pusat dari alam semesta. Pengamatan pertama adalah bintang-bintang, matahari dan planet-planet tampak berputar mengitari bumi setiap hari, membuat bumi adalah pusat sistem ini. Lebih lanjut, setiap bintang berada pada suatu bulatan stelar atau selestial ("''stellar sphere''" atau "''celestial sphere''"), di mana bumi adalah pusatnya, yang berkeliling setiap hari, di seputar garis yang menghubungkan kutub utara dan selatan sebagai aksisnya. Bintang-bintang yang terdekat dengan [[khatulistiwa]] tampak naik dan turun paling jauh, tetapi setiap bintang kembali ke titik terbitnya setiap hari.{{sfn|Kuhn|1957|pp=5-20}} Observasi umum kedua yang mendukung model geosentrik adalah bumi tampaknya tidak bergerak dari sudut pandang pengamat yang berada di bumi, bahwa bumi itu solid, stabil dan tetap di tempat. Dengan kata lain, benar-benar dalam posisi diam.
 
Model geosentrik biasanya dikombinasi dengan suatu Bumi yang bulat oleh filsuf Romawi kuno dan abad pertengahan. Ini tidak sama dengan pandangan model [[Bumi datar]] yang disiratkan dalam sejumlah [[mitologi]], sebagaimana juga dalah kosmologi kitab-kitab suci dan Latin kuno.{{refn|group=n|Alam semesta Mesir secara isi sama dengan alam semesta Babel, yaitu digambarkan seperti kotak persegi panjang dengan orientasi utara-selatan dan dengn permukaan sedikit cembung, di mana Mesir adalah pusatnya. Pandangan astronomi Ibrani kuno yang serupa dapat dilihat dari tulisan-tulisan kitab suci, misalnya teori penciptaan semesta dan berbagai [[mazmur]] yang menyebut "cakrawala", bintang-bintang, matahari dan bumi. Orang Ibrani memandang bumi seakan-akan sebagai permukaan datar yang terdiri dari bagian padat dan cair, dan langit sebagai alam cahaya di mana benda-benda langit bergerak. Bumi ditopang oleh batu-batu penjuru dan tidak dapat digerakkan selain oleh [[Yahweh]] (misalnya dalam kaitan dengan gempa bumi). Menurut orang Ibrani, matahari dan bulan berjarak dekat satu sama lain<ref>{{cite book|chapter= Cosmology|title= Encyclopedia Americana|publisher= Grolier|edition= Online|year= 2012|first= Giorgio|last= Abetti}}</ref>}}{{refn|group=n|Gambaran alam semesta dalam teks-teks Talmud adalah bumi di tengah ciptaan dengan langit sebagai bulatan yang dibentangkan di atasnya. Bumi biasanya digambarkan seperti sebuah piring yang dikelilingi oleh air. Yang menarik spekulasi kosmologi dan metafisika tidak ditanamkan dalam publik maupun dilestarikan dalam tulisan. Namun, dianggap lebih sebagai "rahasia-rahasia [[Taurat]] yang tidak seharusnya diturunkan semua orang dan kalangan" (Ketubot 112a). Meskipun studi penciptaan Allah tidak dilarang, spekulasi tentang "apa yang ada di atas, di bawah, yang ada sebelumnya dan yang kemudian" (Mishnah Hagigah: 2) dibatasi hanya untuk elite intelektual.<ref>{{cite book|chapter= Topic Overview: Judaism|title= Encyclopedia of Science and Religion|editor-first=J. Wentzel Vrede|editor-last= van Huyssteen|volume= 2|location= New York|publisher= Macmillan Reference USA|year= 2003|pages= 477–83|first= Hava|last= Tirosh-Samuelson}}</ref>}}{{refn|group=n|Sebagaimana Midrash dan Talmud, Targum tidak berpandangan adanya suatu bulatan bumi, melainkan suatu piringan bumi datar, yang dikitari matahari dalam jalur setengah lingkaran yang ditempuh rata-rata dalam 12 jam.<ref>{{cite journal |title= The distribution of land and sea on the Earth's surface according to Hebrew sources |first= Solomon |last= Gandz |journal= Proceedings of the American Academy for Jewish Research |volume= 22 |year= 1953 |pages= 23–53}}</ref>}}<!-- The ancient Jewish [[Celestial cartography|uranography]] pictured a flat Earth over which was put a dome-shaped rigid canopy, named firmament (רקיע- rāqîa').{{refn|group=n|"firmament - The division made by God, according to the P account of creation, to restrain the cosmic water and form the sky (Gen. 1: 6-8). Hebrew cosmology pictured a flat earth, over which was a dome-shaped firmament, supported above the earth by mountains, and surrounded by waters. Holes or sluices (windows, Gen. 7: 11) allowed the water to fall as rain. The firmament was the heavens in which God set the sun (Ps. 19: 4) and the stars (Gen. 1: 14) on the fourth day of the creation. There was more water under the earth (Gen. 1: 7) and during the Flood the two great oceans joined up and covered the earth; sheol was at the bottom of the earth (Isa. 14: 9; Num. 16: 30)."<ref>{{cite book |chapter= firmament |title= Dictionary of the Bible |first= W. R. F. |last= Browning |publisher= Oxford University Press |year= 1997 |edition= Oxford Reference Online}}</ref>}}{{refn|group=n|The cosmographical structure assumed by this text is the ancient, traditional flat earth model that was common throughout the Near East and that persisted in Jewish tradition because of its place in the religiously authoritative biblical materials.<ref>{{cite book |title= The Early History Of Heaven |url= https://archive.org/details/earlyhistoryheav00wrig_049 |first= J. Edward |last= Wright |publisher= Oxford University Press |year= 2000 |page= [https://archive.org/details/earlyhistoryheav00wrig_049/page/n173 155] |ref={{Harvid|Wright|2000}}}}</ref>}}{{refn|group=n|“The term "firmament" (רקיע- rāqîa') denotes the atmosphere between the heavenly realm and the earth (Gen. 1:6-7, 20) where the celestial bodies move (Gen. 1:14-17). It can also be used as a synonym for "heaven" (Gen. 1:8; Ps. 19:2). This "firmament is part of the heavenly structure whether it is the equivalent of "heaven/sky" or is what separates it from the earth. […] The ancient Israelites also used more descriptive terms for how God created the celestial realm, and based on the collection of these more specific and illustrative terms, I would propose that they had two basic ideas of the composition of the heavenly realm. First is the idea that the heavenly realm was imagined as a vast cosmic canopy. The verb used to describe metaphorically how God stretched out this canopy over earth is הטנ (nātāh) "stretch out," or "spread." "I made the earth, and created humankind upon it; it was my hands that stretched out the heavens, and I commanded all their host (Isa. 45:12)." In the Bible this verb is used to describe the stretching out (pitching) of a tent. Since the texts that mention the stretching out of the sky are typically drawing on creation imagery, it seems that the figure intends to suggest that the heavens are Yahweh's cosmic tent. One can imagine ancient Israelites gazing up to the stars and comparing the canopy of the sky to the roofs of the tents under which they lived. In fact, if one were to look up at the ceiling of a dark tent with small holes in the roof during the daytime, the roof, with the sunlight shining through the holes, would look very much like the night sky with all its stars. The second image of the material composition of the heavenly realm involves a firm substance. The term רקיע (răqîa'), typically translated "firmament," indicates the expanse above the earth. The root רקע means "stamp out" or "forge." The idea of a solid, forged surface fits well with Ezekiel 1 where God's throne rests upon the רקיע (răqîa'). According to Genesis 1, the רקיע(rāqîa') is the sphere of the celestial bodies (Gen. 1:6-8, 14-17; cf. ben Sira 43:8). It may be that some imagined the עיקר to be a firm substance on which the celestial bodies rode during their daily journeys across the sky.”<ref>{{harvnb|Wright|2000|pp=55–6}}</ref>}}{{refn|group=n|In the course of the Second Temple Period Jews, and eventually Christians, began to describe the universe in new terms. The model of the universe inherited form the Hebrew Bible and the Ancient Near East of a flat earth completely surrounded by water with a heavenly realm of the gods arching above from horizon to horizon became obsolete. In the past the heavenly realm was for gods only. It was the place where all events on earth were determined by the gods, and their decisions were irrevocable. The gulf between the gods and humans could not have been greater. The evolution of Jewish cosmography in the course of the Second Temple Period followed developments in Hellenistic astronomy.<ref>{{harvnb|Wright|2000|p=201}}</ref>}}{{refn|group=n|What is described in Genesis 1:1 to 2:3 was the commonly accepted structure of the universe from at least late in the second millennium BCE to the fourth or third century BCE. It represents a coherent model for the experiences of the people of Mesopotamia through that period. It reflects a world-view that made sense of water coming from the sky and the ground as well as the regular apparent movements of the stars, sun, moon, and planets. There is a clear understanding of the restrictions on breeding between different species of animals and of the way in which human beings had gained control over what were, by then, domestic animals. There is also recognition of the ability of humans to change the environment in which they lived. This same understanding occurred also in the great creation stories of Mesopotamia; these stories formed the basis for the Jewish theological reflections of the Hebrew Scriptures concerning the creation of the world. The Jewish priests and theologians who constructed the narrative took accepted ideas about the structure of the world and reflected theologically on them in the light of their experience and faith. There was never any clash between Jewish and Babylonian people about the structure of the world, but only about who was responsible for it and its ultimate theological meaning. The envisaged structure is simple: Earth was seen as being situated in the middle of a great volume of water, with water both above and below Earth. A great dome was thought to be set above Earth (like an inverted glass bowl), maintaining the water above Earth in its place. Earth was pictured as resting on foundations that go down into the deep. These foundations secured the stability of the land as something that is not floating on the water and so could not be tossed about by wind and wave. The waters surrounding Earth were thought to have been gathered together in their place. The stars, sun, moon, and planets moved in their allotted paths across the great dome above Earth, with their movements defining the months, seasons, and year.<ref>{{cite book |chapter= Biblical Geology |title= Encyclopedia of Geology |editor1-first= Richard C. |editor1-last= Selley |editor2-first= L. Robin M. |editor2-last= Cocks |editor3-first= Ian R. |editor3-last= Plimer |volume= 1 |location= Amsterdam |publisher= Elsevier |year= 2005 |page= 253 |via= Gale Virtual Reference Library |accessdate= 2012-09-15}}</ref>}}{{refn|group=n|From Myth to Cosmos: The earliest speculations about the origin and nature of the world took the form of religious myths. Almost all ancient cultures developed cosmological stories to explain the basic features of the cosmos: Earth and its inhabitants, sky, sea, sun, moon, and stars. For example, for the Babylonians, the creation of the universe was seen as born from a primeval pair of human-like gods. In early Egyptian cosmology, eclipses were explained as the moon being swallowed temporarily by a sow or as the sun being attacked by a serpent. For the early Hebrews, whose account is preserved in the biblical book of Genesis, a single God created the universe in stages within the relatively recent past. Such pre-scientific cosmologies tended to assume a flat Earth, a finite past, ongoing active interference by deities or spirits in the cosmic order, and stars and planets (visible to the naked eye only as points of light) that were different in nature from Earth.<ref>{{cite book |last= Applebaum |first= Wilbur |chapter= Astronomy and Cosmology: Cosmology |title= Scientific Thought: In Context |editor1-first= K. Lee |editor1-last=Lerner |editor2-first= Brenda Wilmoth |editor2-last= Lerner |volume= 1 |location= Detroit |publisher= Gale |year= 2009 |pages= 20–31 |via= Gale Virtual Reference Library |accessdate= 2012-09-15}}</ref>}}
 
However, the ancient Greeks believed that the motions of the planets were circular and not elliptical, a view that was not challenged in [[Western culture]] until the 17th century through the synthesis of theories by [[Nicolaus Copernicus|Copernicus]] and [[Johannes Kepler|Kepler]].
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The astronomical predictions of Ptolemy's geocentric model were used to prepare astrological charts for over 1500 years. The geocentric model held sway into the [[early modern]] age, but from the late 16th century onward was gradually [[Superseded scientific theories#Superseded astronomical and cosmological theories|superseded]] by the [[heliocentrism|heliocentric model]] of [[Nicolaus Copernicus|Copernicus]], [[Galileo Galilei|Galileo]] and [[Johannes Kepler|Kepler]]. However, the transition between these two theories met much resistance, not only from Christian theologians, who were reluctant to reject a theory that was in agreement with Bible passages (e.g. "Sun, stand you still upon Gibeon", Joshua 10:12 - King James 2000 Bible), but also from those who saw geocentrism as an accepted consensus that could not be subverted by a new, unknown theory.
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== Yunani kuno ==
[[Berkas:Persectives of Anaximander's universe.png|jmpl|ka|350px|Illustrasi model alam semesta dari Anaximander. Sebelah kiri: siang hari pada musim panas; sebelah kanan: malam hari pada musim dingin.]]
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Adherence to the geocentric model stemmed largely from several important observations. First of all, if the Earth did move, then one ought to be able to observe the shifting of the fixed stars due to stellar [[parallax]]. In short, if the earth was moving, the shapes of the [[constellation]]s should change considerably over the course of a year. If they did not appear to move, the stars are either much further away than the Sun and the planets than previously conceived, making their motion undetectable, or in reality they are not moving at all. Because the stars were actually much further away than Greek astronomers postulated (making movement extremely subtle), stellar parallax was not detected until the 19th century. Therefore, the Greeks chose the simpler of the two explanations. The lack of any observable parallax was considered a fatal flaw in any non-geocentric theory. Another observation used in favor of the geocentric model at the time was the apparent consistency of Venus' luminosity, which implies that it is usually about the same distance from Earth, which in turn is more consistent with geocentrism than heliocentrism. In reality, that is because the loss of light caused by Venus' phases compensates for the increase in apparent size caused by its varying distance from Earth. Objections to heliocentrism utilized the natural tendency of terrestrial bodies to come to rest as near as possible to the center of the earth, and barring the opportunity to fall closer the center, not to move unless forced by an outside object, or transformed to a different element by heat or moisture.
 
Atmospheric explanations for many phenomena were preferred because the Eudoxan–Aristotelian model based on perfectly concentric spheres was not intended to explain changes in the brightness of the planets due to a change in distance.<ref name="Hetherington2006">{{cite book |last= Hetherington |first= Norriss S. |title= Planetary Motions: A Historical Perspective |url= https://archive.org/details/planetarymotions00heth |year= 2006 |page= [https://archive.org/details/planetarymotions00heth/page/n44 28]}}</ref> Eventually, perfectly concentric spheres were abandoned as it wasn't possible to develop a sufficiently accurate model under that ideal. However, while providing for similar explanations, the later [[deferent and epicycle]] model proved to be flexible enough to accommodate observations for many centuries.
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== Model Ptolemaik ==
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Dikarenakan dominansi ilmiah sistem Ptolemaik dalam astronomi Islam, para astronom Muslim menerima bulat model geosentrik.{{refn|group=n|"Semua astronom Islam dari Thabit ibn Qurra pada abad ke-9 sampai Ibn al-Shatir pada abad ke-14, dan semua filsuf alamiah dari al-Kindi sampai Averroes dan seterusnya, diketahui telah menerima ... gambaran dunia menurut budaya Yunani yang terdiri dari dua bulatan, di mana salah satunya, bulatan selestial ... secara bulat membungkus yang lain."<ref>{{cite journal |first= A. I. |last= Sabra |title= Configuring the universe: Aporetic, problem solving, and kinematic modeling as themes of Arabic astronomy |journal= Perspectives on Science |volume= 6 |issue= 3 |year= 1998 |pages= 317–8}}</ref>}}
 
Pada abad ke-12, [[Abū Ishāq Ibrāhīm al-Zarqālī|Arzachel]] meninggalkan ide Yunani kuno "pergerakan melingkar uniform" (''[[uniform circular motion]]'') dengan membuat hipotesis bahwa planet [[Merkurius]] bergerak dalam orbit eliptik,<ref name="Rufus1939">{{Cite journal |title= The influence of Islamic astronomy in Europe and the far east |url= https://archive.org/details/sim_popular-astronomy_1939-05_47_5/page/233 |last= Rufus |first= W. C. |journal= Popular Astronomy |volume= 47 |issue= 5 |date=May 1939 |pages= 233–8}}</ref><ref name="Hartner1955">{{cite journal |first= Willy |last= Hartner |title= The Mercury horoscope of Marcantonio Michiel of Venice |url= https://archive.org/details/sim_vistas-in-astronomy_1955_1/page/118 |journal= Vistas in Astronomy |volume= 1 |year= 1955 |pages= 118–22}}</ref> sedangkan [[Nur ad-Din al-Bitruji|Alpetragius]] mengusulkan model planetari yang meninggalkan [[equant]], mekanisme epicycle dan eksentrik,<ref name="Goldstein1972"/> meskipun ini menghasilkan suatu sistem yang lebih kurang akurat secara matematik.<ref name="Gale">{{Cite book|chapter= Ptolemaic Astronomy, Islamic Planetary Theory, and Copernicus's Debt to the Maragha School|title= Science and Its Times|publisher= [[Thomson Gale]]|year= 2006}}</ref> [[Fakhr al-Din al-Razi]] (1149–1209), sehubungan dengan konsepsi fisika dan dunia fisika dalam karyanya ''Matalib'', menolak pandangan Aristotelian dan Avicennian bahwa Bumi berada di pusat alam semesta, melainkan berpendapat bahwa ada "ribuan-ribuan dunia (''alfa alfi 'awalim'') di luar dunia ini sedemikian sehingga setiap dunia ini lebih besar dan masif dari dunia ini serta serupa dengan dunia ini." Untuk mendukung argumen teologinya, ia mengutip dari [[Al Quran]], "All praise belongs to God, Lord of the Worlds," menekankan istilah "Worlds" (''dunia-dunia'').<ref name="Setia2004"/>
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The "Maragha Revolution" refers to the Maragha school's revolution against Ptolemaic astronomy. The "Maragha school" was an astronomical tradition beginning in the [[Maragheh observatory|Maragha observatory]] and continuing with astronomers from the [[Umayyad Mosque|Damascus mosque]] and [[Ulugh Beg Observatory|Samarkand observatory]]. Like their [[Al-Andalus|Andalusian]] predecessors, the Maragha astronomers attempted to solve the [[equant]] problem (the circle around whose circumference a planet or the center of an [[epicycle]] was conceived to move uniformly) and produce alternative configurations to the Ptolemaic model without abandoning geocentrism. They were more successful than their Andalusian predecessors in producing non-Ptolemaic configurations which eliminated the equant and eccentrics, were more accurate than the Ptolemaic model in numerically predicting planetary positions, and were in better agreement with empirical observations.<ref name="Saliba1994">{{cite book |last= Saliba |first= George |authorlink= George Saliba |year= 1994 |title= A History of Arabic Astronomy: Planetary Theories During the Golden Age of Islam |url= https://archive.org/details/historyofarabica0000sali |pages= 233–234[https://archive.org/details/historyofarabica0000sali/page/233 233]–234, 240 |publisher= [[New York University Press]] |isbn= 0814780237}}</ref> The most important of the Maragha astronomers included [[Mo'ayyeduddin Urdi]] (d. 1266), [[Nasīr al-Dīn al-Tūsī]] (1201–1274), [[Qutb al-Din al-Shirazi]] (1236–1311), [[Ibn al-Shatir]] (1304–1375), [[Ali Qushji]] (c. 1474), [[Al-Birjandi]] (d. 1525), and Shams al-Din al-Khafri (d. 1550).<ref name="Dallal1999">{{cite book |first= Ahmad |last= Dallal |year= 1999 |chapter= Science, Medicine and Technology |title= The Oxford History of Islam |url= https://archive.org/details/oxfordhistoryofi00john |page= [https://archive.org/details/oxfordhistoryofi00john/page/171 171] |editor-first= John |editor-last= Esposito |editor-link= John Esposito |location= New York |publisher= [[Oxford University Press]]}}</ref> [[Ibn al-Shatir]], the Damascene astronomer (1304&ndash;13751304–1375 AD) working at the [[Umayyad Mosque]], wrote a major book entitled ''Kitab Nihayat al-Sul fi Tashih al-Usul'' (''A Final Inquiry Concerning the Rectification of Planetary Theory'') on a theory which departs largely from the Ptolemaic system known at that time. In his book, "Ibn al-Shatir, an Arab astronomer of the fourteenth century," E. S. Kennedy wrote "what is of most interest, however, is that Ibn al-Shatir's lunar theory, except for trivial differences in parameters, is identical with that of [[Nicolaus Copernicus|Copernicus]] (1473&ndash;15431473–1543 AD)." The discovery that the models of Ibn al-Shatir are mathematically identical to those of Copernicus suggests the possible transmission of these models to Europe.<ref name="Guessoun2008">{{cite journal |last= Guessoum |first= N. |date=June 2008 |title= Copernicus and Ibn Al-Shatir: Does the Copernican revolution have Islamic roots? |journal= The Observatory |volume= 128 |pages= 231–9}}</ref> At the Maragha and [[Ulugh Beg Observatory|Samarkand observatories]], the [[Earth's rotation]] was discussed by al-Tusi and [[Ali Qushji]] (b. 1403); the arguments and evidence they used resemble those used by Copernicus to support the Earth's motion.<ref name="Ragep2001a">{{Cite journal |last= Ragep |first= F. Jamil |year= 2001 |title= Tusi and Copernicus: The Earth's motion in context |journal= Science in Context |volume= 14 |issue= 1-2 |pages= 145–163 |publisher= [[Cambridge University Press]]}}</ref>
<ref name="Ragep2001b">{{Cite journal |last= Ragep |first= F. Jamil |year= 2001 |title= Freeing astronomy from philosophy: An aspect of Islamic influence on science |journal= Osiris |series= 2nd Series |volume= 16 |issue= Science in Theistic Contexts: Cognitive Dimensions |pages= 49–64, 66–71 |doi=10.1086/649338}}</ref>
 
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In 1543, the geocentric system met its first serious challenge with the publication of [[Copernicus|Copernicus']] ''[[De revolutionibus orbium coelestium]]'' (''On the Revolutions of the Heavenly Spheres''), which posited that the Earth and the other planets instead revolved around the Sun. The geocentric system was still held for many years afterwards, as at the time the Copernican system did not offer better predictions than the geocentric system, and it posed problems for both [[natural philosophy]] and scripture. The Copernican system was no more accurate than Ptolemy's system, because it still used circular orbits. This was not altered until [[Johannes Kepler]] postulated that they were elliptical (Kepler's [[Kepler's laws of planetary motion#First Law|first law of planetary motion]]).
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Dengan penemuan [[teleskop]] pada tahun 1609, pengamatan yang dilakukan oleh [[Galileo Galilei]] (antara lain bahwa [[Yupiter]] memiliki sejumlah bulan) mempertanyakan sejumlah prinsip geosentrisme tetapi tidak secara serius mengancamnya. Karena ia mengamati adanya "titik-titik" gelap pada Bulan, kawah-kawah, ia berkomentar bahwa Bulan bukanlah benda langit sempurna sebagaimana anggapan sebelumnya. Ini pertama kalinya orang dapat melihat cacat pada suatu benda langit yang dianggap terbuat dari [[aether]] yang sempurna. Sedemikian, karena cacatnya bulan sekarang dapat dikaitkan dengan apa yang dilihat di Bumi, orang dapat berargumen bahwa keduanya tidak unik, melainkan terbuat dari bahan yang serupa. Galileo juga dapat melihat bulan-bulan yang mengitari Yupiter, yang didedikasikannya kepada [[:en:Cosimo II de' Medici, Grand Duke of Tuscany|Cosimo II de' Medici]], dan menyatakan bahwa bulan-bulan itu mengorbit Yupiter, bukan Bumi.<ref name="Finocchiaro2008">{{cite book|last= Finocchiaro|first= Maurice A.|title= The Essential Galileo|url= https://archive.org/details/essentialgalileo00gali|location= Indianapolis, IL|publisher= Hackett|year= 2008|page= [https://archive.org/details/essentialgalileo00gali/page/n59 49]}}</ref> Ini merupakan klaim signifikan karena jika benar, berarti tidak semua benda langit mengitari Bumi, menghancurkan kepercayaan teologi dan ilmiah yang dianut sebelumnya. Namun, teori-teori Galileo yang menantang geosentrisme alam semesta dibungkam oleh pihak gereja dan sikap skeptik umum terhadap sistem yang tidak menempatkan Bumi di pusat semesta, mempertahankan pikiran dan sistem Ptolemaeus dan Aristoteles.
 
[[Berkas:Phases-of-Venus.svg|jmpl|Fase-fase planet Venus]]
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Pada tahun 1838, astronom [[Friedrich Wilhelm Bessel]] dengan sukses mengukur [[paralaks]] bintang [[61 Cygni]], membuktikan bahwa Ptolemaeus keliru dalam berpendapat bahwa gerakan paralaks tidak ada. Ini akhirnya menguatkan pernyataan Copernicus dengan pengamatan ilmiah yang akurat dan dapat diandalkan, serta menunjukkan betapa jauhnya bintang-bintang dari bumi.
 
Kerangka geosentrik berguna untuk aktivitas sehari-hari dan kebanyakan eksperimen laboratorium, namun kurang cocok untuk mekanika tata surya dan perjalanan di ruang angkasa. Meskipun kerangka heliosentrik berguna untuk hal-hal tersebut, astronomi galaksi maupun di luar galaksi menjadi lebih mudah jika matahari dianggap tidak diam atau punataupun menjadi pusat alam semesta, melainkan berputar mengelilingi pusat galaksi kita, dan galaksi kita selanjutnya juga tidak diam dalam hubungan dengan latar belakang kosmik.
 
== Penganut geosentrisme agamawi dan kontemporari ==
[[Berkas:Orlando-Ferguson-flat-earth-map edit.jpg|ka|jmpl|300px|''Map of the Square and Stationary Earth'' (Peta Bumi bujursangkar dan stasioner/tidak bergerak), karya Orlando Ferguson (1893)]]
 
Model Ptolemaik mengenai tata surya masih terus dianut sampai ke awal zaman modern. Sejak akhir abad ke-16 dan seterusnya perlahan-lahan digantikan sebagai penggambaran konsensus oleh model heliosentrisme. Geosentrisme sebagai suatu kepercayaan agamawi terpisah, tidak pernah padam. Di Amerika Serikat antara tahun 1870-1920, misalnya, berbagai anggota [[Gereja Lutheran – Sinode Missouri]] menerbitkan artikel-artikel yang menyerang sistem astronomi Kopernikan, dan geosentrisme banyak diajarkan di dalam sinode dalam periode tersebut.<ref name="Babinski1995">{{cite journal |editor-last= Babinski |editor-first= E. T. |journal= Cretinism of Evilution |issue= 2 |title= Excerpts from Frank Zindler's 'Report from the center of the universe' and 'Turtles all the way down' |url= http://www.talkorigins.org/faqs/ce/2/part3.html |publisher= [[TalkOrigins Archive]] |year= 1995 |accessdate= 2013-12-01 |archive-date= 2018-02-09 |archive-url= https://web.archive.org/web/20180209235618/http://www.talkorigins.org/faqs/ce/2/part3.html |dead-url= no }}</ref> Namun, pada tahun 1902 ''Theological Quarterly'', A. L. Graebner menyatakan bahwa sinode itu tidak mempunyai posisi doktrinal terhadap geosentrisme, heliosentrisme, atau model ilmiah lainnya, kecuali kalau itu bertolak belakang dengan [[Alkitab]]. Ia menyatakan pula bahwa deklarasi apapun yang dikemukakan para penganut geosentrisme di dalam sinode bukan merupakan pendapat badan gereja secara keseluruhan.<ref name="Graebner1902">{{cite journal |title= Science and the church |journal= Theological Quarterly |first= A. L. |last= Graebner |pages= [http://books.google.com/books?id=cxsRAAAAIAAJ&pg=PA37 37–45] |year= 1902 |publisher= Lutheran Synod of Missouri, Ohio and other states, Concordia Publishing |location= St. Louis, MO |volume= 6}}</ref>
 
Artikel-artikel yang mendukung geosentrisme sebagai pandangan Alkitab muncul pada sejumlah surat kabar sains penciptaan yang berhubungan dengan [[Creation Research Society]]. Umumnya menunjuk kepada beberapa nas [[Alkitab]], yang secara harfiah mengindikasikan pergerakan harian Matahari dan Bulan yang dapat diamati mengelilingi Bumi, bukan karena rotasi Bumi pada aksisnya, misalnya pada {{Alkitab|Yosua 10:12}} di mana Matahari dan Bulan dikatakan berhenti di langit, dan {{Alkitab|Mazmur 93:1}} di mana dunia digambarkan tidak bergerak.<ref name="Numbers1993">{{cite book|title= The Creationists: The Evolution of Scientific Creationism|url= https://archive.org/details/creationistsevol0000numb|publisher= University of California Press|last= Numbers|first= Ronald L.|authorlink= Ronald L. Numbers|year= 1993|page= [https://archive.org/details/creationistsevol0000numb/page/237 237]|isbn= 0520083938}}</ref> Para pendukung kontemporer kepercayaan agamawi itu termasuk [[Robert Sungenis]] (presiden dari[[Bellarmine Theological Forum]] dan pengarang buku terbitan tahun 2006 ''Galileo Was Wrong'' (Galileo keliru)).<ref name="Sefton2006">{{cite news|url= http://news.google.com/newspapers?id=_1kaAAAAIBAJ&sjid=XCYEAAAAIBAJ&dq=robert-sungenis&pg=6714%2C4991566|title= In this world view, the sun revolves around the earth|first= Dru|last= Sefton|newspaper= [[Times-News (Hendersonville, North Carolina)|Times-News]]|location= Hendersonville, NC|date= 2006-03-30|page= 5A|access-date= 2014-03-02|archive-date= 2021-04-27|archive-url= https://web.archive.org/web/20210427173438/https://news.google.com/newspapers?id=_1kaAAAAIBAJ&sjid=XCYEAAAAIBAJ&dq=robert-sungenis&pg=6714%2C4991566|dead-url= no}}</ref> Orang-orang ini mengajarkan pandangan bahwa pembacaan langsung Alkitab memuat kisah akurat bagaimana alam semesta diciptakan dan membutuhkan pandangan geosentrik. Kebanyakan organisasi kreasionis kontemporer menolak pandangan ini.{{refn|group=n|Donald B. DeYoung, misalnya, menyatakan bahwa "Similar terminology is often used today when we speak of the sun's rising and setting, even though the earth, not the sun, is doing the moving. Bible writers used the 'language of appearance,' just as people always have. Without it, the intended message would be awkward at best and probably not understood clearly. When the Bible touches on scientific subjects, it is entirely accurate."<ref>{{cite web |last= DeYoung |first= Donald B. |date= 1997-11-05 |title= Astronomy and the Bible: Selected questions and answers excerpted from the book |url= http://www.answersingenesis.org/Docs/399.asp |accessdate= 2013-12-01 |publisher= Answers in Genesis |archive-date= 2011-08-05 |archive-url= https://web.archive.org/web/20110805222535/http://www.answersingenesis.org/Docs/399.asp |dead-url= no }}</ref>}}
 
{{quote|Dari semuanya, Kopernikanisme merupakan kemenangan besar pertama sains atas agama, sehingga tidak dapat dihindari bahwa sejumlah orang berpikir semua yang salah dengan dunia ini bermula dari sana. (Steven Dutch dari [[University of Wisconsin–Madison]]) <ref>[{{Cite web |url=http://www.uwgb.edu/dutchs/PSEUDOSC/Geocentrism.HTM |title=Geocentrism lives] |access-date=2014-03-02 |archive-date=2017-10-24 |archive-url=https://web.archive.org/web/20171024101108/http://www.uwgb.edu/dutchs/PSEUDOSC/Geocentrism.HTM |dead-url=no }}</ref>}}
[[Morris Berman]] mengutip bahwa hasil survei menyatakan saat ini sekitar 20% penduduk Amerika Serikat percaya bahwa matahari mengitari bumi (geosentrisme) bukan bumi mengitari matahari (heliosentrisme), sementara 9% mengatakan tidak tahu.<ref name="Berman2006">{{cite book|last= Berman|first= Morris|authorlink= Morris Berman|title= Dark Ages America: The Final Phase of Empire|url= https://archive.org/details/darkagesamericaf00berm|year= 2006|publisher= W.W. Norton & Company|isbn= 9780393058666}}</ref> Beberapa poll yang dilakukan oleh [[The Gallup Organization|Gallup]] pada tahun 1990-an mendapati bahwa 16% orang Jermans, 18% orang Amerika dan 19% orang Inggris/Britania Raya percaya bahwa Matahari mengitari Bumi.<ref name="Crabtree1999">{{cite web |url= http://www.gallup.com/poll/3742/new-poll-gauges-americans-general-knowledge-levels.aspx |title= New Poll Gauges Americans' General Knowledge Levels |first= Steve |last= Crabtree |publisher= [[The Gallup Organization|Gallup]] |date= 1999-07-06 |access-date= 2014-03-02 |archive-date= 2014-03-27 |archive-url= https://web.archive.org/web/20140327130003/http://www.gallup.com/poll/3742/New-Poll-Gauges-Americans-General-Knowledge-Levels.aspx |dead-url= no }}</ref> Suatu studi yang dilakukan pada tahun 2005 oleh Jon D. Miller dari [[Northwestern University]], seorang pakar pemahaman publik akan sains dan teknologi,<ref name="MillerBio">{{cite web |url= http://www.cmb.northwestern.edu/faculty/jon_miller.htm |title= Jon D. Miller |work= Northwestern University website |accessdate= 2007-07-19 |archive-date= 2009-02-04 |archive-url= https://web.archive.org/web/20090204023220/http://www.cmb.northwestern.edu/faculty/jon_miller.htm |dead-url= no }}</ref> mendapati sekitar 20%, atau seperlima, orang dewasa Amerika percaya bahwa Matahari mengitari Bumi.<ref name="Dean2005">{{cite news|url= http://www.nytimes.com/2005/08/30/science/30profile.html?ex=1184990400&en=2fb126c3132f89ae&ei=5070|title= Scientific savvy? In U.S., not much|first= Cornelia|last= Dean|date= 2005-08-30|newspaper= New York Times|accessdate= 2007-07-19|archive-date= 2014-08-25|archive-url= https://web.archive.org/web/20140825022235/http://www.nytimes.com/2005/08/30/science/30profile.html?ex=1184990400&en=2fb126c3132f89ae&ei=5070|dead-url= no}}</ref> Menurut poll tahun 2011 oleh [[VTSIOM]], 32% orang [[Russia]] percaya bahwa Matahari mengitari Bumi.<ref name="RussianStudy2011">{{citation |url= http://wciom.ru/index.php?id=459&uid=111345 |title= 'СОЛНЦЕ - СПУТНИК ЗЕМЛИ', ИЛИ РЕЙТИНГ НАУЧНЫХ ЗАБЛУЖДЕНИЙ РОССИЯН |trans_title= 'Sun-earth', or rating scientific fallacies of Russians |issue= Пресс-выпуск №1684 <nowiki>[</nowiki>Press release no. 1684<nowiki>]</nowiki> |date= 2011-02-08 |language= ru |publisher= ВЦИОМ <nowiki>[</nowiki>[[VTSIOM|All-Russian Center for the Study of Public Opinion]]<nowiki>]</nowiki> |postscript= . |accessdate= 2014-03-02 |archive-date= 2018-01-31 |archive-url= https://web.archive.org/web/20180131184406/https://wciom.ru/index.php?id=459&uid=111345 |dead-url= yes }}</ref>
 
[[Albert Einstein]] berpendapat:
Baris 117 ⟶ 118:
 
=== Posisi historis hierarki Katolik Roma ===
[[Galileo affair]] yang terkenal menghadapkan model geosentrik dengan pernyataan [[Galileo]]. Mengenai basis teologi dari argumen semacam itu, dua orang Paus membahas pertanyaan apakah penggunaan bahasa fenomenologi (berdasarkan pengamatan) akan memaksa orang mengakui kesalahan Alkitab. Keduanya mengajarkan bahwa tidak demikian halnya. <!--[[Pope Leo XIII]] wrote:
 
:we have to contend against those who, making an evil use of physical science, minutely scrutinize the Sacred Book in order to detect the writers in a mistake, and to take occasion to vilify its contents. . . . There can never, indeed, be any real discrepancy between the theologian and the physicist, as long as each confines himself within his own lines, and both are careful, as St. Augustine warns us, "not to make rash assertions, or to assert what is not known as known." If dissension should arise between them, here is the rule also laid down by St. Augustine, for the theologian: "Whatever they can really demonstrate to be true of physical nature, we must show to be capable of reconciliation with our Scriptures; and whatever they assert in their treatises which is contrary to these Scriptures of ours, that is to Catholic faith, we must either prove it as well as we can to be entirely false, or at all events we must, without the smallest hesitation, believe it to be so." To understand how just is the rule here formulated we must remember, first, that the sacred writers, or to speak more accurately, the Holy Ghost "Who spoke by them, did not intend to teach men these things (that is to say, the essential nature of the things of the visible universe), things in no way profitable unto salvation." Hence they did not seek to penetrate the secrets of nature, but rather described and dealt with things in more or less figurative language, or in terms which were commonly used at the time, and which in many instances are in daily use at this day, even by the most eminent men of science. Ordinary speech primarily and properly describes what comes under the senses; and somewhat in the same way the sacred writers-as the Angelic Doctor also reminds us – `went by what sensibly appeared," or put down what God, speaking to men, signified, in the way men could understand and were accustomed to. ([[Providentissimus Deus]] 18).
Baris 144 ⟶ 145:
 
Menurut [[Muhammad Nashiruddin Al-Albani|Syaikh Albani]], "Dalam [[ilmu Geograf]]i bumi memang bulat dan berputar, akan tetapi dalam ilmu agama, ia lebih cenderung memilih pendapat bahwa bumi dalam keadaan tetap dan datar, dengan dalil yang tersirat (bukan dalil tegas), karena tidak ada dalil yang tegas bahwa bumi itu bulat.
 
Berikut adalah salah satu contoh dalil tidak tegas dalam ayat Qur'an yang menyatakan matahari-lah yang berputar mengelilingi bumi,
{{Cquote|[[Ibrahim]] berkata, “…Sesungguhnya Allah menerbitkan matahari dari timur…" (Al Baqarah 2:258)}}
 
== Planetarium ==
Baris 172 ⟶ 170:
<ref name="Lawson2004">{{cite book|last= Lawson|first= Russell M.|year= 2004|title= Science in the Ancient World: An Encyclopedia|pages= [http://books.google.com/?id=1AY1ALzh9V0C&pg=PA30 29–30]
|publisher= [[ABC-CLIO]]|isbn= 1851095349|ref={{Harvid|Lawson|2004}}}}</ref>
<ref name="Fraser2006">{{cite book|last= Fraser|first= Craig G.|title= The Cosmos: A Historical Perspective|url= https://archive.org/details/cosmoshistorical00fras_616|year= 2006|page= [https://archive.org/details/cosmoshistorical00fras_616/page/n26 14]}}</ref>
<ref name="Goldstein1967">{{cite journal|title= The Arabic version of Ptolemy's planetary hypothesis|url= https://archive.org/details/sim_transactions-of-the-american-philosophical-society_1967-06_57_4/page/6|first= Bernard R.|last= Goldstein|page= 6|journal= Transactions of the American Philosophical Society|year= 1967|volume= 57|issue= pt. 4|jstor= 1006040}}</ref>
<ref name="Goldstein1972">{{cite journal|first= Bernard R.|last= Goldstein|year= 1972|title= Theory and observation in medieval astronomy|journal= Isis|volume= 63|issue= 1|page= 41}}</ref>
<ref name="Setia2004">{{Cite journal|title= Fakhr Al-Din Al-Razi on physics and the nature of the physical world: A preliminary survey|first= Adi|last= Setia|journal= Islam & Science|volume= 2|year= 2004}}</ref>
<ref name="JohansenRosenmeier1998">{{cite book|first1= K. F.|last1=Johansen|first2= H.|last2= Rosenmeier|title= A History of Ancient Philosophy: From the Beginnings to Augustine|url= https://archive.org/details/historyancientph00joha|year= 1998|page= [https://archive.org/details/historyancientph00joha/page/n57 43]}}</ref>
<ref name="Sarton1953">{{cite book|first= George|last= Sarton|title= Ancient Science Through the Golden Age of Greece|year= 1953|page= 290}}</ref>
<ref name="Eastwood1992">{{Cite journal|volume= 23|page= 233|last= Eastwood|first= B. S.|title= Heraclides and heliocentrism – Texts diagrams and interpretations|journal= Journal for the History of Astronomy|date= 1992-11-01}}</ref>
<ref name="Lindberg2010">{{cite book|last= Lindberg|first= David C.|title= The Beginnings of Western Science: The European Scientific Tradition in Philosophical, Religious, and Institutional Context, Prehistory to A.D. 1450|edition= 2nd|year= 2010|publisher= University of Chicago Press|isbn= 9780226482040|page= [http://books.google.com/books?id=dPUBAkIm2lUC&pg=PA197 197]}}</ref>
<ref name="Russell1945">{{cite book|last= Russell|first= Bertrand|authorlink= Bertrand Russell|title= [[A History of Western Philosophy]]|origyear= 1945|year= 2013|publisher= Routledge|page= 215|isbn= 9781134343676}}</ref>
<ref name="Nussbaum2007">{{Cite journal|url= http://www.skeptic.com/the_magazine/featured_articles/v12n03_orthodox_judaism_and_evolution.html|title= Orthodox Jews & science: An empirical study of their attitudes toward evolution, the fossil record, and modern geology|accessdate= 2008-12-18|last= Nussbaum|first= Alexander|date= 2007-12-19|journal= Skeptic Magazine|archive-date= 2010-07-04|archive-url= https://web.archive.org/web/20100704183723/http://www.skeptic.com/the_magazine/featured_articles/v12n03_orthodox_judaism_and_evolution.html|dead-url= no}}</ref>
<ref name="Nussbaum2002">{{cite journal|first= Alexander|last= Nussbaum|title= Creationism and geocentrism among Orthodox Jewish scientists|journal= Reports of the National Center for Science Education|date=January–April 2002|pages= 38–43}}</ref>
<ref name="SchneersohnGotfryd2003">{{cite book|last1= Schneersohn|first1= Menachem Mendel|authorlink1= Menachem Mendel Schneerson|last2= Gotfryd|first2= Arnie|title= Mind over Matter: The Lubavitcher Rebbe on Science, Technology and Medicine|pages= [http://books.google.com/books?id=FmabnhsgSVAC&pg=PA76 76ff.]; cf. xvi-xvii, [http://books.google.com/books?id=FmabnhsgSVAC&pg=PA69 69], [http://books.google.com/books?id=FmabnhsgSVAC&pg=PA100 100–1], [http://books.google.com/books?id=FmabnhsgSVAC&pg=PA171 171–2], [http://books.google.com/books?id=FmabnhsgSVAC&pg=PA408 408ff.]|year= 2003|publisher= Shamir|isbn= 9789652930804}}</ref>
<ref name="Mishneh Torah">{{cite book|title= Mishneh Torah|url= http://www.chabad.org/library/article_cdo/aid/947929/jewish/Chapter-Eleven.htm|chapter= Sefer Zemanim: Kiddush HaChodesh: Chapter 11|page= Halacha 13–14|nopp= y|others= Translated by Touger, Eliyahu|publisher= Chabad-Lubavitch Media Center|access-date= 2014-03-02|archive-date= 2023-06-22|archive-url= https://web.archive.org/web/20230622200831/https://www.chabad.org/library/article_cdo/aid/947929/jewish/Chapter-Eleven.htm|dead-url= no}}</ref>
<ref name="Rabinowitz1987">{{cite web|url= http://www.pages.nyu.edu/%7Eair1/GeoCentrism%20&%20EgoCentrism,%20Existentialist%20Despair%20&%20Significance.htm|first= Avi|last= Rabinowitz|year= 1987|title= EgoCentrism and GeoCentrism; Human Significance and Existential Despair; Bible and Science; Fundamentalism and Skepticalism|work= Science & Religion|accessdate= 2013-12-01|archive-date= 2011-03-14|archive-url= https://web.archive.org/web/20110314150928/http://www.pages.nyu.edu/~air1/GeoCentrism|dead-url= yes}} Published in {{cite book|editor1-last= Branover|editor1-first= Herman|editor2-last= Attia|editor2-first= Ilana Coven|title= Science in the Light of Torah: A B'Or Ha'Torah Reader|url= https://archive.org/details/scienceinlightof0000unse|year= 1994|publisher= Jason Aronson|isbn= 9781568210346}}</ref>
<ref name="Hort1822">{{cite book|first= William Jillard|last= Hort|title= A General View of the Sciences and Arts|url= https://archive.org/details/ageneralviewsci01hortgoog|year= 1822|page= [https://archive.org/details/ageneralviewsci01hortgoog/page/n196 182]}}</ref>
<ref name="Kaler2002">{{cite book|last= Kaler|first= James B.|title= The Ever-changing Sky: A Guide to the Celestial Sphere|year= 2002|page= 25}}</ref>
}}
 
== Pustaka ==
* {{cite book|title = Theories of the World from Antiquity to the Copernican Revolution|url = https://archive.org/details/theoriesofworldf0000crow|last = Crowe|first= Michael J.|publisher = Dover Publications|year = 1990|location = Mineola, NY|isbn = 0486261735|ref = {{Harvid|Crowe|1990}}}}
* {{cite book|title= A History of Astronomy from Thales to Kepler|last= Dreyer|first= J.L.E.|publisher= Dover Publications|year= 1953|url=http://www.archive.org/details/historyofplaneta00dreyuoft|location= New York
|ref={{Harvid|Dreyer|1953}}|authorlink= John Louis Emil Dreyer}}
* {{cite book|last= Evans|first= James|title= The History and Practice of Ancient Astronomy|location= New York|publisher= Oxford University Press|year= 1998|ref={{Harvid|Evans|1998}}}}
* {{cite book|last= Heath|first= Thomas|authorlink= T. L. Heath|title= Aristarchus of Samos|url= https://archive.org/details/aristarchusofsam0000heat|location= Oxford|publisher= Clarendon Press|year= 1913|ref={{Harvid|Heath|1913}}}}
* {{cite book|authorlink= Sir Fred Hoyle|last= Hoyle|first= Fred|title= Nicolaus Copernicus|url= https://archive.org/details/bwb_P8-BLU-347|year= 1973|ref={{Harvid|Hoyle|1973}}}}
* {{cite book|authorlink= Arthur Koestler|last= Koestler|first= Arthur|title= The Sleepwalkers: A History of Man's Changing Vision of the Universe|origyear= 1959|publisher= Penguin Books|year= 1986|isbn= 014055212X|ref={{Harvid|Koestler|1959}}}} 1990 reprint: ISBN 0-14-019246-8.
* {{cite book|authorlink= Thomas Samuel Kuhn|last= Kuhn|first= Thomas S.|title= The Copernican Revolution|url= https://archive.org/details/copernicanrevolu0008kuhn|location= Cambridge|publisher= Harvard University Press|year= 1957|isbn= 0674171039|ref={{Harvid|Kuhn|1957}}}}
* {{cite book|title= From Eudoxus to Einstein—A History of Mathematical Astronomy|last= Linton|first= Christopher M.|publisher= Cambridge University Press|year= 2004|location= Cambridge|isbn= 9780521827508|ref={{Harvid|Linton|2004}}}}
* {{cite book|editor-last= Walker|editor-first= Christopher|title= Astronomy Before the Telescope|url= https://archive.org/details/astronomybeforet0000unse_b2s7|location= London|publisher= British Museum Press|year= 1996|isbn= 0714117463|ref={{Harvid|Walker|1996}}}}
 
== Pranala luar ==
* [http://www.astro.utoronto.ca/~zhu/ast210/geocentric.html Another demonstration of the complexity of observed orbits when assuming a geocentric model of the solar system] {{Webarchive|url=https://web.archive.org/web/20090330002544/http://www.astro.utoronto.ca/~zhu/ast210/geocentric.html |date=2009-03-30 }}
* [http://www.astronomy.ohio-state.edu/~pogge/Ast161/Movies/#ptolemaic Geocentric Perspective animation of the Solar System in 150AD] {{Webarchive|url=https://web.archive.org/web/20210508074738/http://www.astronomy.ohio-state.edu/~pogge/Ast161/Movies/#ptolemaic |date=2021-05-08 }}
* [http://library.thinkquest.org/29033/history/ptolemy.htm Ptolemy’s system of astronomy] {{Webarchive|url=https://web.archive.org/web/20071015162256/http://library.thinkquest.org/29033/history/ptolemy.htm |date=2007-10-15 }}
* [http://galileo.rice.edu/sci/theories/ptolemaic_system.html The Galileo Project – Ptolemaic System] {{Webarchive|url=https://web.archive.org/web/20140408231957/http://galileo.rice.edu/sci/theories/ptolemaic_system.html |date=2014-04-08 }}
 
{{Astronomi Yunani}}
 
{{Authority control}}
 
{{DEFAULTSORT:Geocentric Model}}