galileo galilei discovered that the earth rotates on an axis.
galileo galilei discovered that the earth rotates on an axis.
who discovered that the earth rotates on an axis?
galileo galilei
in 1030, abū al-rayhān al-bīrūnī discussed the indian planetary theories of aryabhata, brahmagupta and varahamihira in his "ta'rikh al-hind" (latinized as "indica"). biruni stated that brahmagupta and others consider that the earth rotates on its axis and biruni noted that this does not create any mathematical problems. abu said al-sijzi, a contemporary of al-biruni, suggested the possible heliocentric movement of the earth around the sun, which al-biruni did not reject. al-biruni agreed with the earth's rotation about its own axis, and while he was initially neutral regarding the heliocentric and geocentric models, he considered heliocentrism to be a philosophical problem. he remarked that if the earth rotates on its axis and moves around the sun, it would remain consistent with his astronomical parameters:
cosmology in medieval islam
as noted by copernicus himself, the notion that the earth rotates is very old, dating at least to philolaus (c. 450 bc), heraclides ponticus (c. 350 bc) and ecphantus the pythagorean. roughly a century before copernicus, the christian scholar nicholas of cusa also proposed that the earth rotates on its axis in his book, "on learned ignorance" (1440). al-sijzi also proposed that the earth rotates on its axis. empirical evidence for the earth's rotation on its axis, using the phenomenon of comets, was given by tusi (1201–1274) and ali qushji (1403–1474).
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