FAMOUS ASTRONEMERS

ARISTOTLE

• 384-322 BC
• Studied under plato
• Thought all planets were circular and move in circular motions
• Proved earth was a sphere
• Thought it was the center of the universe
• Earth revolved around the sun

ARISTARCHUS

• First to say the sun is the center of the earth
• Attempted to measure the distance from the sun to earth and the earth to the moon, but he wasn't accurate because he didn't have the technology

PTOLEMY

• Thought the Earth was the center of the universe
• Lived in Alexandria Egypt
• Thought even the earth spins
• 90-168AD

COPERNICUS

• 1473-1543
• Believed that the center of the universe was the sun
• Made models of the sun in the center

KEPLER

• 1571-1630
• Discovered 2 laws
• The planets move in elliptical orbits
• Time is necessary to traverse the arc of planetary

GALILEO

• 1564-1642
• Invented the telescope
• "Father of the observational astronomy

GEOCENTRIC SOLAR SYSTEM MODEL

• 1543
• Publication of the solar model

HELIOCENTRIC MODEL

• Theory that places the sun at the center of the universe
• It's has all the planets orbiting the sun