HISPTICAL MODELS OF THE

SOLAR SYSTEM

• Is the sun and all of the bodies that orbit the sun.
• Heliocentric model: earth and the other planets orbit the sun.
• Geocentric model: which used earth as the center and are called earth-centered

ARISTOTLE

• A Greek philosopher
• Thought earth was the center of all things
• He thought that if there earth went around the sun, the relative positions would change earths moves.
• This is called parallax

ARISTARCHUS

• Was a Greek astronomer and mathematician
• Proposed a heliocentric model of the solar system

PTOLEMY

• Was an astronomer, geographer, and mathematician
• Developed a detailed geocentric model that used by astronomers for the next 14 centuries

COPERNICUS

• Polish astronomer named Nicolaus Copernicus
• Developed the first detailed heliocentric model of the solar system

KEPLER

• Was a German mathematician and astronomer.
• Kepler tried other types of paths and found that ellipses fit best.
• Kepler formulated three principles, which today are know as kepler's laws.

GALILEO

• Was a scientist who approached questions in the fashion that today we call scientific methods
• Galileo made significant improvements to the newly invented telescope.