He wrote Cosmos and Billions and Billions born 1934, died 1996 http://www.imdb.com/name/nm0755981/biohttp://www.imdb.com/name/nm0755981/bio

Ptolemy was born in 65 A.D. and died in 165 A.D.

Very influental greek

Made the book Almagest

http://www-groups.dcs.sand.ac.uk/~history/Biographies/Ptolemy.html

Aristotle was around in the 4th century

His teachings are called the Arganon

http://www.philosophypages.com/ph/aris.htm

Hipparchus 190 to 121 B.CE.

He discovered the precession of the equinoxes

http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Hipparchus.html