But within a few era’s time, Copernicus’ theory turned more widespread and accepted, and gained many influential defenders within the meantime. Around the identical time, Iranian philosopher Abu Rayhan Biruni 973 – 1048) discussed the possibility of Earth rotating about its own axis and across the solar – though he considered this a philosophical problem and never a mathematical one. For instance, the tenth-century Iranian astronomer Abu Sa’id al-Sijzi contradicted the Ptolemaic model by asserting that the Earth revolved on its axis, thus explaining the obvious diurnal cycle and the rotation of the celebrities relative to Earth.
In the early eleventh century, Egyptian-Arab astronomer Alhazen wrote a critique entitled Doubts on Ptolemy (ca. 1028) during which he criticized many aspects of his model. All orbits surround the solar as if it were within the center, and therefore the center of the world is near the sun. The retrograde movement of … Read More