PTOLEMY

NATION OF ORGIN

• Greco-Roman writer of Alexandria
• Mathematician, Astronomer, Geographer, Astrologer
• Poet of a single epigram in the Greek Athology
• Born 87 AD to150 AD

NATION OF WORK

• 127-141 AD
• Made astronomical observations
• Alexandria, Egypt

MAJOR CONTRIBUTION

• One of the greatest and most influential Ancient Greek Astronomers
• Presented details for the motion of each planet
• His model could so accurately explain the motion of heavenly bodies
• It became the model for understanding the structure of the solar system
• Earth was the center of the solar system, AND the whole universe

CONTRIBUTION

• One of the greatest and most influential
• Ancient Greek Astrologers
• Presented details for the motions of each planet

FUN FACTS

• Ptolemy never left Alexandria, Egypt
• His personal life was not recorded as much as his works
• Wrote two books in his lifetime
• Almagest and Tetrabiblos

TOOLS

• Epicycles: combinations of circular motion
• To predict the positions of the sun, moon, and planets
• Quadrant: instrument used to measure angles up to 90
• To measure the suns position
• Armillary Sphere used to give planets a longitude and latitude

MODEL OF UNIVERSE

• Earth is the center
• Geocentric Model: everything revolved around the earth
• Stars were lights attached to a crystal sphere that spun around
• Planets traveled in spheres of their own

CONTEMPORARIES

• Theon of Smyrna was almost certainly his teacher
• Theon was an observer and mathematician
• Wrote astronomical topics such as;
• Conjunctions, eclipses, occultations and transits

MAJOR EVENTS

• Ptolemy published two books
• The Almagest
• An astronomical manual split up into 13 books
• Tetrabiblos
• Split into 4 books, explains how Earth is the center of the universe

BIBLIOGRAPHY

• http://t.answers.com/answers/#!/entry/what-was-ptolemys-theory-of-the-solar...
• http://www.nndb.com/people/035/000029945/
• http://www.britannica.com/EBchecked/topic/16707/Almagest
• http://www-history.mcs.st-and.ac.uk/Biographies/Ptolemy.html