THE ASTRNOMERS

ARISTOTLE

• Thought earth was center of earth
• His model had earth in the center and everything else around it.

ARISTARCHUS

• Tried to measure relative distance to sun and moon
• Major contribution to science
• His model however was rarely accepted.

PTOLEMY

• He believed that the celestial body traveled in perfect circle
• Developed detailed model used by people for next 14 centuries.

COPERNICUS

• Developed first detailed heliocentric model of the solar system
• First step in development of solar system

KEPLER

• Found that planets don't travel in perfect circle
• Contributed keplers laws

GALILEO

• Significant improvements to telescope
• Earth was not only object to orbit