ASTRONMERS QUICK TIMELINE

ARISTOTLE

• Aristotle thought the world was in the center of every thing
• He thought that the earth went around the sun
• His contribute is the parallax
• The parallax is when you look at an object from a different position it moves too
• He study how you look at things in space and where they are

ARISTARCHUS

• He believed the sun was in the middle of everything
• He contributed by attempting to measure the distance to the moon
• But at the time his idea was not widely accepted
• He studied the distance from earth to the moon

PTOLEMY

• He believed that the earth was the middle of everything
• He also believed planets move in circles while going around the sun
• He contributed by making the Ptolemaic model
• This model was used for 1400 years until Copernicus came along
• He studied how planets move in circles

COPERNICUS

• He believed that the sun was the center of everything
• He contributed by making the copernican model
• He studied how the moon moves around the earth
• His model was seen as the first step in modern day models

KEPLER

• He Believed planets didn't move in perfect circles
• He contributed by making the three Kepler laws
• He studied how planets moved

GALILEO

• He believed other planets had moons
• He studied that other planets had moons
• He contributed by making the firs telescope