Ptolemy was an influential Greek astronomer and geographer who lived from around 85 AD to 165 AD in Alexandria, Egypt. He developed the geocentric model of the universe that was accepted for over 1400 years. Ptolemy made astronomical observations from 127-141 AD and recorded them along with observations made by his teacher Theon of Smyrna. His most important work was the Almagest, which laid out his mathematical theories of planetary motions and dominated astronomy as a science from the 2nd century until the Renaissance.

1. Born in about 85 AD in Egypt and died in
about 165 AD in Alexandria, Egypt.
Possibilities

2. • One of the most influential Greek
astronomers and geographers of his
time, Ptolemy propounded the
geometric theory in a form that prevailed
for 1400 years . Ptolemy was a
mathematician of the very top rank.
Possibilities

3. • He made astronomical
observations from
Alexandria, Egypt during the
years AD 127-141. Ptolemy
observations made by “
Theon the mathematician ”
who was almost certainly
Theon of Smyrna, who must
have been his teacher
Possibilities

4. • The most important of his works is the
Almagest whose original title was “ The
mathematical Compilation “.
• From in conception in the second century
until the late renaissance ,this work
determined astronomy as a science .
Possibilities

5. • The Almagest is the earliest of Ptolemy’s
works and gives in detail the mathematical
theory of the motions of the sun , moon and
planets. Ptolemy’s “Almagest” shares with
Euclid’s “Elments” the glory of being the
scientific text longest in use.

6. http://en.wikipedia.org/wiki/Ptolemy
Possibilities