Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Ko da yake an kafa ka'idodin ka'idodin Girkawa na Girkawa a lokacin Aristotle, cikakkun bayanai game da tsarinsa ba su zama misali ba. Tsarin Ptolemaic, wanda masanin astronomer Claudius Ptolemaeus ya bunkasa a karni na 2 AD ya ƙaddamar da daidaitattun geocentrism. Babban aikinsa na ilimin taurari, Almagest, shine ƙarshen ƙarni na aikin Hellenic, Hellenistic da Babylonian astronomers. Fiye da shekaru dubu, Masana ilimin taurari na Turai da na Islama sun ɗauka cewa shi ne ainihin tsarin sararin samaniya. Saboda tasirinsa, wasu lokuta mutane suna tunanin cewa tsarin Ptolemaic daidai yake da tsarin geocentric.  Tambaya: Yaushe ne aka daidaita yanayin ƙasa?
Karni na biyu AD