Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
According to ancient and medieval thinkers, what were the celestial orbs made of?
According to ancient and medieval thinkers, what were the celestial orbs made of?
- Gems
- Thick spheres of rarefied matter (correct)
- Empty space
- Aetherial and transparent fifth element
What did scholars presume about each planetary sphere when applying Ptolemy's epicycles?
What did scholars presume about each planetary sphere when applying Ptolemy's epicycles?
- Each planetary sphere was in complete contact with the sphere above and below it (correct)
- Each planetary sphere was exactly the same size
- Each planetary sphere was transparent
- Each planetary sphere was made of gems
What was the purpose of the celestial orbs in the cosmological models?
What was the purpose of the celestial orbs in the cosmological models?
- To account for the apparent motions of the fixed stars and planets (correct)
- To demonstrate the existence of aetherial matter
- To explain the existence of gems
- To create a visual representation of the universe
What did ancient and medieval thinkers believe about the positions of the fixed stars relative to one another?
What did ancient and medieval thinkers believe about the positions of the fixed stars relative to one another?
Signup and view all the answers
How are the orbits of the planets viewed in modern thought?
How are the orbits of the planets viewed in modern thought?
Signup and view all the answers
