Ptolemy of Alexandria (c ninety AD – c 168 ADVERT) compiled an astronomical work, the Almagest, which based itself on the geo-centric system of Aristotle and his plausible notion that the celestial our bodies, being excellent spheres, essentially needed to move in good circles. The Almagest offered a table which allowed the fairly accurate prediction of celestial occasions similar to eclipses and the long run positions in the sky of the planets. In Ptolemy’s system, the movements of the Solar and the planets had been described via an advanced system of fifty four circles and epicycles, which were circles upon circles.
Accuracy: This page is concerning the research of biology in Historic Greece. Moreover Aristotle, there were many other Greeks who had an curiosity in studying totally different species, similar to Anaximander and Theophrastes. This web site is accurate as a result of it mentions Aristotle as the father of biology and his systematic strategy to categorise completely different species. Aristotle was fascinated with the pure world and his analysis involved comparing completely different species in order to classify the similarities and variations between them. The creator has clearly done good analysis on this subject and has made the site a reliable source for all.
Subsequently he concluded that, although the sun was far-off, its rays weren’t parallel to earth. He measured the angle of the shadow it cast to be roughly 1/fiftieth of a 360-degree circle and estimated the distance between the cities to be 5000 stades (Greek measurement of scale). By doing so, he was able to conclude that the circumference of the earth should be fifty instances by 5000 stades, which might complete 250,000 stades – approximately 25,000 miles! Although he was a little bit method off, his results are quite remarkable given his instruments!
Accuracy: The information from this source appears to be correct as a result of it gives a descriptive rationalization of Aristotle’s geocentric photo voltaic system, whereas offering credible sources to articles from the MIT college website. For example, when the author explains Aristotle’s reasoning for planets moving in perfect circles, he writes, “Aristotle believes that the objects in the heavens are good and unchanging. The general article summarizes the work of Aristotle and supplies credible data to its readers.
The e book described pharmacological methods and in addition 760 medicine and was thought to be essentially the most genuine materia medica of that period. Lots of his writings were later misplaced however do obtain point out within the notes of later nice thinkers together with Archimedes. A e-book by Vitruvius, a Roman well-known architect mentions that the commonly used sundial was invented by Aristarchus. Abul Wafa contributed mainly in the subject of mathematics, especially in the fields of geometry and trigonometry. His achievements and contributions to the sphere of geometry include:
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