ASTRONOMY

WHAT IS ASTRONOMY

• The study of....
• Celestial objects
• Space
• Physical universe

ASTRONOMERS

ARISTOTLE

• Believed in geocentric universe
• Planets and stars where spheres
• That the earth was the center of the universe
• Planets and stars moved in a circular motion

ARISTOTLE

• Contributed many new ideas
• Used science to observe space
• Questioned space scientifically

ARISTARCHUS

• Came up with the idea of sun being the center of the universe
• A attempted to measure the distance from the earth to the moon

PTOLEMY

• Ptolemaic system
• Earth centered universe
• All objects in space moved at the same rate

KEPLER

• Copernician model of the universe
• Elliptical motion of the planets (kelper's first law)

COPERNICUS

• Sun is the center of the universe
• Planets move in circular motions

GALILEO GALILEI

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