Assertion: concentric sphere | /r/CapableOf | move with differing speeds
Facets:
value: from east
type: MANNER
Source sentences:
text: Near the end of the twelfth century, the Spanish Muslim astronomer al-Bitrūjī (Alpetragius) sought to explain the complex motions of the planets without Ptolemy's epicycles and eccentrics, using an Aristotelian framework of purely concentric spheres that moved with differing speeds from east to west.