THE HISTORY OF ASTRONOMY

ASTRONOMERS

• Aristotle
• Aristarchus
• Ptolemy
• Copernicus
• Kepler and Galileo Galilei

ARISTOLE

• He thought that the Earth was the center of all things and earth is a sphere
• His contribution was called the parallax
• A parallax is where you see an object in different places

ARISTARCHUS

• He proposed the heliocentric model
• He attempted to measure the distances from the earth to the moon

PTOLEMY

• He thought that the Earth was in the middle of everything
• He developed a geocentric model that was used in the next 14 centuries
• Thought the planets moved in perfect circles

COPERNICUS

• He thought that the sun was in the middle
• His contribution were the first step in development
• Of modern models of the solar system

KEPLER

• He thought that the sun was in the middle
• His contributions were the laws of the solar system
• He thought that ellipses were the best that fit

GALILEO GALILEI

• He thought that the sun was in the middle of everything
• He improved the telescope and could obverse the phases of Venus and the moon
• Other planets orbit the sun not only earth