Aristotle
Definition
Aristotle was an ancient Greek philosopher whose works covered a broad range of subjects, including astronomy. He proposed a geocentric model of the universe, where Earth is at the center and all celestial bodies revolve around it.
5 Must Know Facts For Your Next Test
- Aristotle's geocentric model influenced astronomical thought for nearly two millennia.
- He believed that the heavens were composed of a different substance called 'aether,' which was perfect and unchanging.
- Aristotle's observations included the idea that celestial bodies move in perfect circles.
- He argued that the Earth is spherical based on observations like the shape of Earth's shadow during lunar eclipses.
- Aristotle's ideas were later challenged by astronomers such as Copernicus and Galileo who supported heliocentric models.
Review Questions
- What type of model did Aristotle propose for the universe?
- What substance did Aristotle believe made up celestial bodies?
- How did Aristotle explain the shape of Earth's shadow during lunar eclipses?
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Related terms
Geocentric Model: A description of the universe with Earth at its center.
Aether: In ancient Greek philosophy, aether is the material believed to fill the region of the universe above the terrestrial sphere.
Heliocentric Model: A description of the universe with the Sun at its center, proposed by Copernicus.
