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Encyclopedia4U - Ptolemaic system - Encyclopedia Article (729 words) |
 | The Ptolemaic system was a system to explain the motions of the heavens, espoused by Claudius Ptolemaeus in Almagest sometime around the 2nd century, C.E., and accepted for over a thousand years by the vast majority of people to be the correct cosmological model. |
 | Unlike earlier systems (such as 'the stars move because that is the will of the gods', or the model of concentric spheres), the Ptolemaic model explained all phenomena in the sky, while holding to Plato's dictum which states that all motions in the heavens can be explained with uniform, circular motion, and obeying Aristotelian physics. |
 | According to the Ptolemaic model, Earth is at the center of the universe. |
| Ptolemaic Dynasty - Ptolemy I - XV (1794 words) |
 | Ptolemaic Dynasty - Ptolemy I - XV Ptolemaic Dynasty - Ptolemy I - XV - Cleopatra |
 | Ptolemy VI Philometor was the sixth ruler of the Ptolemaic Dynasty. |
 | Ptolemy VII Neos Philopator was the seventh ruler of the Ptolemaic Dynasty. |