Observing The Solar System

Earth The Center

Greek Observations

Geocentric-Earth is at the center of the solar system with revolving planets and starts

Ptolemy's Model

Ptolemy further developed the geocentric model

In this model, the planets move on small circles that move on bigger circles

Sun At The Center

Copemicus was able to work out the arrangement of the known planets and how they move around the sun

Galileo’s Evidence

Galileo used the newly invented telescope to make discoveries that supported the heliocentric model

He discovered 4 moons revolving around Jupiter, proving that not everything revolves around the earth

Venus’s pattern of movement also supported a heliocentric model, it is always seen near the sun and goes through phases similar the the moon

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