Curated OER
Astronomer Research
Students discover the contributions of early astronomers and scientists. In this research skills lesson, students research electronic and print sources about Galileo Galilei, Aristarchus, Hipparchus, Claudius Ptolemy, Nicholas...
Wolfram Research
Wolfram Science World: Ptolemy (Ca. 100 Ca. 170)
A very brief description of Ptolemy's role in researching astronomy. Links to related information.
City University of New York
Map Projection Basics: Bits of Map Projection History
Surveys the ideas of Claudius Ptolemy (90-170 AD) in regard to the shape of the world and his influence on the history of mapmaking.
Other
Nine planets.org: Ptolemy
This site from the University of Arizona provides a background of Ptolemy's profound influence in the areas of astronomy, geography, and cartography. Includes good pictures and related links.