Models of the Universe Flashcards
Pythagorean
Plato
Aristotle
Eudoxus
Ptolemy
Geocentric
Aristarchus
Copernicus
Galilei
Kepler
Heliocentric
Tycho Brahe
Geoheliocentric
Pythagorean Model
heavenly bodies move in
a circular motion
Plato’s Saving Appearance
All motions are perfectly circular, ethereal/perfect
Aristotle’s Model
Proved that the Earth is spherical
Eudoxus’ Model
First model of the geocentric model
Ptolemy’s Model
Everything moves in perfect circles with contant speed
deferent (ptolemy)
orbit
epicycle (ptolemy)
axis
Heliocentric rotation
east to west
Aristarchus’ Model
First to place the sun at the center of the universe
Copernicus’ Model
Celestial motions are uniform, infinite and circular
Tycho Brahe’s Model
Planets revolving around the sun, and the sun revolving around the
Earth
Kepler’s Model
The discovery that planets move in elliptical orbits with the Sun at the
focus
