ASTRONOMERS

ARISTOTLE

• He thought earth was the center of all things.
• His model of the solar system revolved around earth
• He thought stars moved around.

ARISTARCHUS

• Reported to have had heliocentric model of the solar system.
• Attempted to measure the distance to the moon and sun
• Although his ratio was to small it was very important to science
• His models wasn't accepted

PTOLEMY

CORPERNICUS

• Felt Ptolemy's model was to complex
• Aware of heliocentric idea
• Developed heliocentric model

KEPLER

• Created Kepler's laws
• 1st law planet orbits are ellipses sun at center
• 2nd law planets faster when orbit closer to the sun
• 3rd law relates distance planet from sun to time takes to orbit

GALLILEO

• Made improvements on the telescope
• Showed earth was not the only object being orbited
• Gave support to heliocentric model

THE END