6 FAMOUS PEOPLE

ARISTOTLE

• Composed that the heavens were made of 55 concentric
• Tried to explain how the universe worked
• Proposed the earth is a sphere
• Said the earth is in the middle of the universe

ARISTARCHUS

• Proposed a heliocentric model of the solar system
• Attempted to measure the distance to the moon
• Attempted to measure the distance to the sun
• He loved math!

PTOLEMY

• Observed 800 year old planets
• Wrote a book about them⬆️
• Made a geocentric model used by many astronomers
• Believed the celestial body moved in a perfect circle

COPERNICUS

• Thought Ptolemy's model was to complicated
• Believed planetary paths should be perfect circles
• Used a "wheels-on-wheels" system
• His model was better that Ptolemy's

KEPLER

• Beleived planetary motions moved circular
• Believed Planets move faster in their orbits
• He made three laws
• First law was the most effective

GALILEO GALILEI

• Approached questions with the scientific method
• Made improvements to the telescope
• Observed earth was not the only object that orbited
• Observed Venus went through phases similar to the phases of earths moon

THE END