Circa 150 A.D. Hipparchus created principals were founded stating that the earth was the center of the universe (Jones, A.R., n.d.).
The Geocentric Model was brought about by Claudius
Ptolemy who lived circa 90-168 A.D. (Cessna, 2009).
This model was thought to be truth well into the 16 th century. Although heliocentric (sun-centered) models and concepts had existed for centuries it wasn’t until the
16th century that it began to gain traction. Built off of
Aristarchus’ work Nicolaus Copernicus was able to gain popularity for this model (Cessna, 2009).
Before The Geocentric Model
Circa 150 B.C. Hipparchus put the Earth at the center of the Universe in his astronomical work.
Hipparchus assumed that all of the solar system bodies visible to the naked eye
(Moon, Mercury, Venus, Mars, Sun
Jupiter and Saturn) revolved around the earth in an ellipse pattern (Jones, A.R.,
Circa 100 A.D Rome- A man by the name of Claudius Ptolemy developed the most widely known version of the geocentric model. This came to be known as the Ptolemaic Model of the
Principals of this model were credited to Hipparchus, Plato and Aristotle as well (Cessna,
Sun-Centered Solar System
In the 16th century, Nicolaus
Copernicus published On the
Revolutions of the Heavily Bodies depicting his work in the development of the heliocentric model. His work took the previously know hypothesis’ of Aristarchus and added the missing elements through geometry to take it to the theory that it is known for today
(Cessna , 2009).
(Cessna , 2009)
The Discovery of
The Discovery of Uranus
he discovered the planet Uranus while investigating it as a comet
1785-1789 Friedrich Wilhelm Herschel