Names Of Historic Greek Astronomers

The essential 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 had to introduce additional complications: off-setting the earth fromthe heart of the deferent; various 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 through the second century A.D. Hisastronomical treatise, known as we speak by its Arabic title Almagest , turned the authoritativereference on the subject throughout the Arab world and Europe for the subsequent 1400 years.

The Greek contribution to astronomy was not a lot in commentary as it was in applying logical considering and geometry to these observations. That is how Greek scientists found out that the earth went around the solar , calculated the size of the earth, and understood that the moon went around the earth. Some well-known Greek astronomers were Thales , who figured out that the earth was spherical, Anaxagoras , who found out what induced eclipses, and Aristarchus , who found out that the earth went around the sun. a b “Penn State Erie-School of Science-Astronomy and Astrophysics” Archived from the original on 21 September 2012 Retrieved 20 June 2007

The highest vote went to “Vulcan”, based mostly on a suggestion from actor William Shatner of TELEVISION’s “Star Trek”, however it was rejected because that identify has already been used in astronomy. The examine of objects exterior our galaxy is a department of astronomy concerned with the formation and evolution of Galaxies ; their morphology and classification ; and the examination of lively galaxies , and the teams and clusters of galaxies The latter is necessary for the understanding of the massive-scale structure of the cosmos The Quest for Extraterrestrial Intelligence” Cosmic Search Magazine. Archived from the original on 18 August 2006 Retrieved 12 August 2006

The size of the day, the month and the yr is thought. The five naked eye planets are identified. 600 BC In Greece, Anaximander notices that the stars appear to rotate round a pole. He suggests that the sky is an entire sphere around the Earth. He thinks that the Earth’s floor must be curved after hearing that travellers noticed new stars showing when shifting north or south. He pictures the Earth as aplanets are known to move in opposition to the background of the celebs which appear mounted to a crystal sphere. The phrase planet means “wanderer”.

For those who ask two astrologers what exactly is the best way to create ahoroscope, you will doubtless not get the identical answer. Some astrologers useonly the normal five planets plus the Moon and the Sun. Others haveadded in planets that have been discovered because the ancients inventedastrology. Still others even include asteroids and other minor Photo voltaic Systembodies. Others assume you needto be accurate right down to the date.