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Claudius Ptolemaeus Claudius Ptolemaeus Astronomer & Mathematician Astronomer & Mathematician Presented By: Presented By: Daniel Ramirez Daniel Ramirez Daisy Garcia Daisy Garcia Jessica Caballero Jessica Caballero Heladio Rosales Heladio Rosales Alessandro Crinzi Alessandro Crinzi Javier Muñoz Javier Muñoz
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Claudius Ptolemaeus Astronomer & Mathematician

Jan 03, 2016

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Claudius Ptolemaeus Astronomer & Mathematician. Presented By: Daniel Ramirez Daisy Garcia Jessica Caballero Heladio Rosales Alessandro Crinzi Javier Muñoz. Outline. Unknown Life Profile His Work Theories Did You Know References. Unknown Life. - PowerPoint PPT Presentation
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Page 1: Claudius Ptolemaeus Astronomer & Mathematician

Claudius PtolemaeusClaudius PtolemaeusAstronomer & MathematicianAstronomer & Mathematician

Presented By:Presented By:

Daniel RamirezDaniel Ramirez Daisy GarciaDaisy Garcia Jessica CaballeroJessica Caballero Heladio RosalesHeladio Rosales Alessandro CrinziAlessandro Crinzi Javier MuñozJavier Muñoz

Page 2: Claudius Ptolemaeus Astronomer & Mathematician

OutlineOutline Unknown LifeUnknown Life ProfileProfile His Work His Work TheoriesTheories Did You KnowDid You Know ReferencesReferences

Page 3: Claudius Ptolemaeus Astronomer & Mathematician

Unknown LifeUnknown Life

Knowledge of Ptolemy’s life is not Knowledge of Ptolemy’s life is not known in great detail. Most of the known in great detail. Most of the information that is known comes out information that is known comes out from his surviving work.from his surviving work.

Page 4: Claudius Ptolemaeus Astronomer & Mathematician

ProfileProfile

Name:Name: Claudius PtolemaeusClaudius Ptolemaeus Birth:Birth: About AD 85About AD 85 Birthplace:Birthplace: Ptolemais HermiouPtolemais Hermiou Residence:Residence: Alexandria, EgyptAlexandria, Egypt Death: About AD 165Death: About AD 165

Page 5: Claudius Ptolemaeus Astronomer & Mathematician

ProfileProfile

Ptolemy lived during the time in which the Romans Ptolemy lived during the time in which the Romans controlled Egypt, and was a Roman citizen. controlled Egypt, and was a Roman citizen.

It is assumed that Theon was one of his teachers, It is assumed that Theon was one of his teachers, for Ptolemy used observations made by the for Ptolemy used observations made by the mathematician.mathematician.

Page 6: Claudius Ptolemaeus Astronomer & Mathematician

His WorkHis Work

His landmark work His landmark work was his was his Mathematical Mathematical compilation known compilation known as “The Almagest”.as “The Almagest”.

The Almagest was The Almagest was written in Greek and written in Greek and it was composed of it was composed of 13 books, which he 13 books, which he covered various covered various topics, like topics, like geography, geography, astrology, and the astrology, and the study of music. study of music.

Page 7: Claudius Ptolemaeus Astronomer & Mathematician

His WorkHis Work

Ptolemy was a geographer. He mapped Ptolemy was a geographer. He mapped the world as it was known at the time, and the world as it was known at the time, and included estimates of longitude and included estimates of longitude and latitude and of the earth’s size.latitude and of the earth’s size.

It is said that his maps of Asia and Africa It is said that his maps of Asia and Africa inspired Christopher Columbus on his inspired Christopher Columbus on his expeditions of the West, for his map expeditions of the West, for his map placed Asia much too far east than it placed Asia much too far east than it actually was.actually was.

Page 8: Claudius Ptolemaeus Astronomer & Mathematician

His WorkHis Work Ptolemy also studied Ptolemy also studied

the properties and the properties and behavior of light and behavior of light and dedicated 5 books of dedicated 5 books of his Almagest to the his Almagest to the subject, which he titled subject, which he titled Optics.Optics.

He also dealt with He also dealt with reflection from various reflection from various types of mirrors and types of mirrors and studied the refraction studied the refraction of light as it passes of light as it passes from one medium to from one medium to another.another.

Page 9: Claudius Ptolemaeus Astronomer & Mathematician

His His TheoriesTheories

• Known for his Known for his Ptolemaic System Ptolemaic System (theory).(theory).

• This stated that the This stated that the Earth was the Earth was the center of the center of the universe, consisting universe, consisting of concentric of concentric rotating spheres rotating spheres that rotated about that rotated about the Earth with fixed the Earth with fixed stars.stars.

Page 10: Claudius Ptolemaeus Astronomer & Mathematician

His TheoriesHis Theories

• The Ptolemic The Ptolemic system dominated system dominated astronomical astronomical thoughts for over thoughts for over 1,500 years.1,500 years.

• The Copernican The Copernican system (which system (which stated that the sun stated that the sun was the center of was the center of the universe) the universe) replaced it in the replaced it in the 1500s, for it made 1500s, for it made more senses and it more senses and it explained some explained some astronomical events astronomical events that the Ptolemic that the Ptolemic system could not.system could not.

Page 11: Claudius Ptolemaeus Astronomer & Mathematician

Did You KnowDid You Know

Some scholars doubt the originality of Some scholars doubt the originality of Ptolemy’s ideas, believing that he simply Ptolemy’s ideas, believing that he simply repeated the conclusions of ancient repeated the conclusions of ancient astronomers and mathematicians.astronomers and mathematicians.In addition, some references state that it In addition, some references state that it was actually unlikely that Ptolemy was actually unlikely that Ptolemy believed in the reality of his system; he believed in the reality of his system; he may have thought of it only as a means of may have thought of it only as a means of calculating planetary positions.calculating planetary positions.

Page 12: Claudius Ptolemaeus Astronomer & Mathematician

ReferencesReferences

• http://seds.lpl.arizona.edu/nineplanets/pcshttp://seds.lpl.arizona.edu/nineplanets/pcs/theman.html/theman.html

• G.J. Toomer “Ptolemy”, pp.186-206 in G.J. Toomer “Ptolemy”, pp.186-206 in The The Dictionary of Scientific BiographyDictionary of Scientific Biography,New ,New York 1970York 1970

• L.C. Taub L.C. Taub Ptolemy’s UniversePtolemy’s Universe, Chicago , Chicago 19931993

• T.Barton T.Barton Ancient AstrologyAncient Astrology, London 1994, London 1994• ““Ptolemy” Ptolemy” Encyclopedia BritannicaEncyclopedia Britannica 1999 1999

ed.ed.