Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
The Ptolemaic System:
The theoretical n'mdel of the universe given by the Greeks had a stationary Earth at its centre, around which the Sun, the Moon and the planets moved in circular orbits. I,n this model of the universe, stars merely acted as a bedrop, much iike a painted screen hung by a photographer at a village fair! But, doesn't this seem to be the most natural idea in the world? The Earth seems steady, solid, unmoving, while we can see the heavenly bodies rising and setting each day.
Most of the models constructed by the Greeks to explain the movement of planets consisted of perfect concentric spheres or circles. They held that each planet was attached to an invisible sphere or a circle that rotated around the Earth at a different speed from .the rest of the spheres. You may recall Eudoxus' model of 27 spheres, shown partly. The astronomical ideas of many earlier Greeks were gathered by Ptolemy who published them in his Almagest. This series of thirteen volumes contained the ideas of such men as Aristotle, Apollonius, Hipparchus, in addition to his own ideas. This combined picture of the r~niverse is called the Ptolemaic system. There were some exceptions to this model. Notable among these was the argument of Aristarchus of Samos, that the Earth was one of the several planets, which like them orbits the Sun which was at the centre of the universe. He also argued that the Sun was much bigger than the-Earth and stars were enormously far away. However, we do not know how he reached these conclusions, each of which is correct.
Define the Factors That Are Affecting Colour Perception The two most important factors which influence colour perception include: Temperature, and Humidity How do these factors
Draw a diagram of one battery connected to two light bulbs
For water soluble/miscible solid and liquid wastes The familiar method of mopping the waste with plenty of water and running the same into the drainage could be done for miscib
describe the factors which decide the broad area of scientific activity
Explain Age Related Changes - Ageing Age related changes are mainly observed at a cellular level. The connective tissues throughout body show an increase in stiffness because o
Life of a Star: A young star is thought to be composed largely of hydrogen gas. Hence, the most likely place for a star to be born is in one of the numerous clouds of hydrog
Unit 1 : Due this friday. 11/09 ........ 150 word.. no more than 190 word Discussion topic #1: Drawing upon two major conclusions from the author, explain why the artic
Question 1 What is medical negligence? Explain with examples 2 Explain the following >>Subpoena >>Medical lien
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd