"Ibn al-Shatir was the first astronomer to have successfully challenged the Ptolemaic cosmological system of planets revolving ... influenced by Ibn al-Shatir's astronomy and his ideas that ...

The Ptolemaic Watch from The Philosopher's Guild harbors a color solar system for a watch face, with the hour and minute hands serving as the moon and sun. Astronomy aside ("Let us not speak of ...

This Ptolemaic system presented tables of information allowing ... Kepler's three laws made him a giant of astronomy. "The era in which Kepler lived was one of tremendous upheaval and change ...

“Ibn al-Shatir was the first astronomer to have successfully challenged the Ptolemaic cosmological system of planets ... influenced by Ibn al-Shatir’s astronomy and his ideas that the Earth ...