Who is ptolemy and what did he believe

What trait do all solar system models chair? What is the identity of the planets? Which planet is the smallest and the closest to the sun? What is the 4th smallest planet? What is the 2 smallest planet? What is the biggest planet on Earth?

Which is the 5 largest planet? What is the 3 biggest planet? What is the 6 largest planet? What is the closest planet to Sun? How many planets are there in ?

What is the next livable planet? Is there 8 or 9 planets? Who found the planets? The sophisticated geometry the Babylonians once used, ignored by the Greeks, was adopted and surpassed by Yunus, who used trigonometry to calculate 40 planetary conjunctions and 30 solar eclipses. One of the most important works of Islamic astronomy was the Book of Fixed Stars. The Arabic constellations were traditionally used by Bedouin travelers who needed to cross long distances over land, especially the Silk Road trade route.

The Book of Fixed Stars was the most in-depth description of the night sky available, and it was also one of the first star catalogs to feature illustrations to make reading easier. The Arabic names of many stars would be retained as the book became influential in the Western world, and, to this day, most bright stars still have names derived from Arabic. He believed that each star had some influence over a specific aspect of the Universe, and that their precise movements would influence human behavior and natural events.

As Islamic star catalogs, astrological texts, and translations of the work of Greek philosophers became available in Latin, a new age of learning and discovery began across Europe. An interest in classical philosophy and science was rekindled, and the Renaissance began.

This period would see new astronomers rise up and challenge the centuries-old geocentric theory, aided by the invention of the telescope. Astronomers would see the Universe in far more detail than ever before. A little over years ago, Nicolaus Copernicus came up with a radical way of looking at the Universe.

His heliocentric system put the Sun helio at the center of our system. He was not the first to have this theory. Earlier starwatchers had believed the same, and, in fact, Copernicus cited Aristarchus of Samos as an inspiration, but it was Copernicus who brought it to the world of the Renaissance and used his own observations of the movements of the planets to back up his idea.

His ideas, including the revelation that the Earth rotates on its axis, were too different for most of the scholars of his time to accept. They used only parts of his theory. Those who did study his work intact often did so in secret. They were called Copernicans. Born in Pisa, Italy, approximately years after Copernicus, Galileo became a brilliant student with an amazing genius for invention and observation.

He had his own ideas on how motion really worked, as opposed to what Aristotle had taught, and devised a telescope that could enlarge the visibility of objects up to eight times their original size.

After a later upgrade, it could enlarge objects up to 20 times. He would be the first to observe that the Milky Way was actually a group of stars, rather than clouds in the night sky. He was able to use this telescope to prove the truth of the Copernican system of heliocentrism. He published his observations which went against the established teaching of the Church. He was brought to trial and, although he made a confession of wrongdoing, he was still kept under house arrest for the rest of his life.

But it was too late to lock away the knowledge that Galileo shared. Other scientists, including Sir Isaac Newton and Johannes Kepler, seized its importance and were able to learn even more about the ways of the world and the heavens beyond.

These early scientists' legacies continue to this day. As time goes on, we use our instruments, science, math, reasoning, and creativity to learn more about the secrets of the Universe. Much of medieval astronomy and geography were built on his ideas: his world map, published as part of his treatise Geography in the 2nd century, was the first to use longitudinal and latitudinal lines. This idea of a global coordinates system was highly influential, and we use a similar system today.

However, he is most known for refining the cycles and epicycles that made the geocentric theory of the universe tenable for 14 centuries, as established in his book The Almagest on the motions of the stars and planets. B Chatterjee, Geometrical interpretation of the motion of the sun, moon and the five planets as found in the mathematical syntaxis of Ptolemy and in the Hindu astronomical works, J. Asiatic Soc. E Craig ed.

Storia Sci. S Drake, Ptolemy, Galileo, and scientific method, Stud. Yu N Efremov and E D Pavlovskaya, Determination of the epoch of the star catalogue 'Almagest' by analyzing the proper motion of the stars on a problem of the authorship of Ptolemy's star catalogue Russian , Istor. J Evans, On the function and the probable origin of Ptolemy's equant, Amer. J Evans, On the origin of the Ptolemaic star catalogue, J. Statistical analysis, Acta Appl. O Gingerich, Was Ptolemy a fraud?

R P Lorch, Ptolemy and Maslama on the transformation of circles into circles in stereographic projection, Arch. Y Maeyama, Ancient stellar observations : Timocharis, Aristyllus, Hipparchus, Ptolemy - the dates and accuracies, Centaurus 27 3 - 4 , - K P Moesgaard, In chase of an origin for the mean planetary motions in Ptolemy's 'Almagest', in From ancient omens to statistical mechanics, Acta Hist.

Arabic Sci. A Murschel, The structure and function of Ptolemy's physical hypotheses of planetary motion, J.

A Pannekoek, Ptolemy's precession, Vistas in Astronomy 1 , 60 - D Rawlins, Ancient heliocentrists, Ptolemy, and the equant, Amer. A I Sabra, Psychology versus mathematics : Ptolemy and Alhazen on the moon illusion, in Mathematics and its applications to science and natural philosophy in the Middle Ages Cambridge-New York, , -