Wonderful Facts About The Science And History Of Astronomy

Done by both Kenzie and Gaohmong Probably the most famous Greek Astronomer was Claudius Ptolemy- higher often called Ptolemy- lived from concerning the year 100 to 270.His title, Claudius Ptolemy, is after all a mixture of the Greek Egyptian “Ptolemy” and the Roman “Claudius”. This might point out that he was descended from a Greek household dwelling in Egypt and that he was a citizen of Rome.

Not like the Babylonians, Greeks astronomers have sought a geometrical ordering precept behind the phenomena that are visible within the sky. An early Greek astronomer would have noticed that the movement of the objects in the sky seemed to follow common cycles. Additionally, the cycles of the sun, moon, stars and planets did not correspond precisely, giving rise to even longer cycles. Dark matter” NASA. 2010. Archived from the original on 30 October 2009 Retrieved 2 November 2009 “third paragraph, “There may be at present much ongoing research by scientists attempting to discover precisely what this darkish matter is””

The basic deferent-epicycle model can account for the ahead and retrograde motionof the planets. But to match the observed planetary motions in quantitative element, ancient Greek astronomers needed to introduce additional issues: off-setting the earth fromthe heart of the deferent; varying the rate at which the deferent turns throughout itsrotation; and so forth. This effort culminated within the workof Ptolemy , an astronomer who lived in Alexandria during the second century A.D. Hisastronomical treatise, known in the present day by its Arabic title Almagest , turned the authoritativereference on the subject all through the Arab world and Europe for the next 1400 years.

Mainly at the moment astronomy was all to do with time maintaining. It’s natural that astronomical occasions such as the day would make a pure interval ofand likewise the periodic phases of the moon make the following natural time span. Certainly these offered the basic strategies of time conserving around the interval of seven-hundred BC but, in fact, another important time period, the 12 months, was not straightforward to determine when it comes to months.

Also, the position of fastened stars seemed to alter slightly from everyday with the same rotation from east to west. This slight change within the fixed stars seemed to go through a complete cycle yearly, in line with the cycle of seasons. Various different cycles corresponded to years. The path of the sun within the sky was altering each day, following an annual cycle. The cycle of the day, referred to as additionally the every day cycle (Earth rotation around its axis in 24 hours) and the annual cycle (rotation of Earth around the solar takes a 12 months) was described by Plato within the dialogue “Timaeus”.