Related articles:
Venus
Heliocentrism
Ptolemy
Galileo Galilei
Anaximander
Aristarchus of Samos
Firmament
Planetarium
Earth
Key terms:
planets
geocentric
venus
sphere
ptolemaic
epicycle
astronomy
astronomers
deferent
ptolemy
observations
plato
heliocentric
geocentric model
center of the universe
aristotle
celestial
galileo
ptolemaic system
copernicus
maragha
parallax
kepler
phases
geocentric system
each planet
solar system
around the sun
venus and mercury
planetary
aristotelian
copernican system
ptolemaic astronomy
teoria
heavenly bodies
gravitation
earth was a sphere
pythagoreans
superseded
cosmologies
century bc
revolved around
eccentric
other planets
galileo galilei
ancient greek
hellenistic
fixed stars
retrograde motion
tycho brahe
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