Ptolemy

“…were collected to study the ancient theories of Ptolemy , whose work was seen as final word on astronomy until Muslim times. The key aspect of Ptolemy’s ideas was the geocentricity of the…”

“…light in Ibn al-Haytham’s time was promoted by Ptolemy , who argued that light is a ray that is emitted from the eye, bounces off objects, and comes back into the eye, allowing…”

“…of ancient thinkers like Brah magupta, Aristotle, Euclid, Ptolemy, and Hippocrates into Arabic to allow debate and development of mathematics, astronomy, chemistry, medicine, and engineering. It was a golden age of thought, development,…”

“…to combine the "mathematical" approach of Euclid and Ptolemy with the "physical" principle favored by natural philosophers. Ibn al-Haytham said, "The knowledge of optics demands a combination of physical and mathematical study "…”

“…those that were available during the lifetime of Ptolemy and other Greek geographers. Among the House of Wisdom's luminaries of the time were the Banu Musa brothers, Muhammad, Ahmed, and A!-Hasan, knovvn as…”

“…subject is found in the work Almagest by Ptolemy, who was an astronomer working in Alexandria in the early pa11 of the second century C.E. Ptolemy's treatise reached European scholars via Muslim hands,…”

“…what it had been in the time of Ptolemy. The Gr eek astronomer placed the sun at longitude 65 degrees, but Al-Battani found it at longitude 82 degrees. This discrepancy was a distance…”

“…In the case of lunar motion, he corrected Ptolemy, whose imagined moon approached far closer to the Earth than did the actual moon. After noting, as did other Muslim astronomers before him, the…”

“…was done previously with small, portable instruments, and Ptolemy carried out his obse rvational work with these. There was one man, Caliph Al-Ma'mun, who ruled from Baghdad from 813 to 833, who really…”

“…standard. Al-Battani's treatise was very different from the pre-Ptolemaic design of a celestial globe, which used five parallel equatorial rings and constellation outlines. Instead, al-Battani had a more precise method of charting the…”

“…(d. 1007); Madrid, Claudius Ptolemaeus, also known as Ptolemy Spain; astronomer and mathematician. (85-165 CE.); Alexandria, Egypt; geographer Al-Masudi, Abu l-Hassan Ali ibn al- Hussain (871- and astronomer. 957); Baghdad, Iraq; explorer, geogr…”