1 Timeline 2 Geocentric model
... • Center of deferent is at center of Earth (sort of) Ptolemy’s Geocentric Model • Ptolemy invented the device called the eccentric • The eccentric is the center of the deferent • Sometimes the eccentric was slightly off center from the center of the Earth Ptolemy’s Geocentric Model • Uniform circula ...
... • Center of deferent is at center of Earth (sort of) Ptolemy’s Geocentric Model • Ptolemy invented the device called the eccentric • The eccentric is the center of the deferent • Sometimes the eccentric was slightly off center from the center of the Earth Ptolemy’s Geocentric Model • Uniform circula ...
The Roots of Astronomy Stonehenge
... planetary motion studies. • Discovered exploding stars and comets. • Debated the validity of the heliocentric model. • Realized that the Universe is changing and is complex. ...
... planetary motion studies. • Discovered exploding stars and comets. • Debated the validity of the heliocentric model. • Realized that the Universe is changing and is complex. ...
The Copernican revolution
... keep pace with stars. These objects are called planets. The moon and the sun also move at a different pace from the stars. From such observations, most people would conclude that the stars, sun, moon, and planets all are moving in circles around the Earth. This is the conclusion most observers drew ...
... keep pace with stars. These objects are called planets. The moon and the sun also move at a different pace from the stars. From such observations, most people would conclude that the stars, sun, moon, and planets all are moving in circles around the Earth. This is the conclusion most observers drew ...
Today`s Powerpoint
... Ancient Greek astronomers knew of Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn. ...
... Ancient Greek astronomers knew of Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn. ...
The Copernican Revolution
... pioneering insistence on Astronomy based on physical causes.” It is “remarkable how Galileo . . . used his observations to challenge the traditional geocentric Cosmology.” ...
... pioneering insistence on Astronomy based on physical causes.” It is “remarkable how Galileo . . . used his observations to challenge the traditional geocentric Cosmology.” ...
The Copernican Cosmos
... the five planets orbit the Sun, while the Moon and the Sun orbit the stationary Earth. Sphere of fixed stars remained. Brahe supported his model by observing that the stars did not shift (i.e., he could not observe parallaxes). ...
... the five planets orbit the Sun, while the Moon and the Sun orbit the stationary Earth. Sphere of fixed stars remained. Brahe supported his model by observing that the stars did not shift (i.e., he could not observe parallaxes). ...
Powerpoint
... • Much of the knowledge of the world came together as the rule of Alexander spread across Europe, Asia, and Northern Africa. • Founded the city of Alexandria • Library of Alexandria contained the written works and inventions of many great thinkers and scientists. ...
... • Much of the knowledge of the world came together as the rule of Alexander spread across Europe, Asia, and Northern Africa. • Founded the city of Alexandria • Library of Alexandria contained the written works and inventions of many great thinkers and scientists. ...
Early Observers (The Beginnings of Astronomy)
... Planets traveled in smaller circular paths as they traveled around the Earth (epicycles and deferents) Popular model of universe for 1,500 years. ...
... Planets traveled in smaller circular paths as they traveled around the Earth (epicycles and deferents) Popular model of universe for 1,500 years. ...
THE MEDIEVAL ARISTOTELIAN WORLD VIEW Some
... How could the Moon follow Earth if Earth was moving around the Sun? How could Earth move around the Sun? A tremendous force is needed to cause this movement. Such a force cannot exist. There were other astronomical observations that contradicted the new system. These contradictions could be explaine ...
... How could the Moon follow Earth if Earth was moving around the Sun? How could Earth move around the Sun? A tremendous force is needed to cause this movement. Such a force cannot exist. There were other astronomical observations that contradicted the new system. These contradictions could be explaine ...
Tayler Vence PHYS 1010 5/5/2013 The Copernican Revolution The
... to the bible; however, Copernicus continually argued that the odd “wandering” motion of the known planets could also be explained if they were orbiting the Sun, instead of the Earth. This led to the theory that the Earth was also in orbit around the sun. (Cessna) Copernicus had known the views of th ...
... to the bible; however, Copernicus continually argued that the odd “wandering” motion of the known planets could also be explained if they were orbiting the Sun, instead of the Earth. This led to the theory that the Earth was also in orbit around the sun. (Cessna) Copernicus had known the views of th ...
22.1 Early Astronomy
... • From Poland • Convinced that Earth is a planet just like the other five ...
... • From Poland • Convinced that Earth is a planet just like the other five ...
Astronomical history
... being the first star in our solar system and being the furthest away eluding to that the stars were placed outside of our solar system. (c) Ptolemy knew that Mars moved across the sky in a looping motion called retrograde motion. His model explained this motion using epicycles. Use the diagram below ...
... being the first star in our solar system and being the furthest away eluding to that the stars were placed outside of our solar system. (c) Ptolemy knew that Mars moved across the sky in a looping motion called retrograde motion. His model explained this motion using epicycles. Use the diagram below ...
Our SOlar System
... That is, as illustrated in the adjacent figure, stars should appear to change their position with the respect to the other background stars as the Earth moved about its orbit, because of viewing them from a different perspective ...
... That is, as illustrated in the adjacent figure, stars should appear to change their position with the respect to the other background stars as the Earth moved about its orbit, because of viewing them from a different perspective ...
The History of Astronomy
... Developed the first solar system model with the Earth at the center ...
... Developed the first solar system model with the Earth at the center ...
Quiz # 2 - Oglethorpe University
... B. the changing distance from the Earth to the Sun. C. the tilt of the Earth’s equatorial plane with respect to its orbit. D. changing temperatures of the Sun. E. retrograde motion of the Sun. 2.) At the time of Copernicus, the fact that parallactic shifts of the brighter stars could NOT be detected ...
... B. the changing distance from the Earth to the Sun. C. the tilt of the Earth’s equatorial plane with respect to its orbit. D. changing temperatures of the Sun. E. retrograde motion of the Sun. 2.) At the time of Copernicus, the fact that parallactic shifts of the brighter stars could NOT be detected ...
Quiz 2 Key - Oglethorpe University
... B. the changing distance from the Earth to the Sun. C. the tilt of the Earth’s equatorial plane with respect to its orbit. D. changing temperatures of the Sun. E. retrograde motion of the Sun. 2.) At the time of Copernicus, the fact that parallactic shifts of the brighter stars could NOT be detected ...
... B. the changing distance from the Earth to the Sun. C. the tilt of the Earth’s equatorial plane with respect to its orbit. D. changing temperatures of the Sun. E. retrograde motion of the Sun. 2.) At the time of Copernicus, the fact that parallactic shifts of the brighter stars could NOT be detected ...
Foundations of Astronomy Presentation
... Still “measured” no stellar parallax over an entire year. Earth must be stationary. ...
... Still “measured” no stellar parallax over an entire year. Earth must be stationary. ...
Copernican heliocentrism
Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. It positioned the Sun near the center of the Universe, motionless, with Earth and the other planets rotating around it in circular paths modified by epicycles and at uniform speeds. The Copernican model departed from the Ptolemaic system that prevailed in Western culture for centuries, placing Earth at the center of the Universe, and is often regarded as the launching point to modern astronomy and the Scientific Revolution.Copernicus was aware that the ancient Greek Aristarchus had already proposed a heliocentric theory, and cited him as a proponent of it in a reference that was deleted before publication, but there is no evidence that Copernicus had knowledge of, or access to, the specific details of Aristarchus' theory. Although he had circulated an outline of his own heliocentric theory to colleagues sometime before 1514, he did not decide to publish it until he was urged to do so late in his life by his pupil Rheticus. Copernicus's challenge was to present a practical alternative to the Ptolemaic model by more elegantly and accurately determining the length of a solar year while preserving the metaphysical implications of a mathematically ordered cosmos. Thus his heliocentric model retained several of the Ptolemaic elements causing the inaccuracies, such as the planets' circular orbits, epicycles, and uniform speeds, while at the same time re-introducing such innovations as,Earth is one of several planets revolving around a stationary Sun in a determined orderEarth has three motions: daily rotation, annual revolution, and annual tilting of its axisRetrograde motion of the planets is explained by Earth's motionDistance from Earth to the Sun is small compared to the distance to the stars.↑ 1.0 1.1 ↑