1. Helping to pave the way…

2. Aristotle 340 B.C Famous philosopher Said earth was round
EVERYTHING IN THE UNIVERSE REVOLVES AROUND THE EARTH- “Geocentric Model”

3. Eratosthenes
Eratosthenes ( B.C.)- great Greek mathematician who determined the circumference (distance around) of the Earth using shadow observations.
Click on Eratosthenes

5. Ptolemy 100-170 A.D. Greece Latitude & longitude Counted the stars
Created star tables to help explorers (Columbus)
Geocentric Model
Ptolemy
Aristotle and Ptolemy

6. Geocentric Theory
The idea that the Earth was at the center of the universe.
Aristotle and Ptolemy strong supporters, along with church officials
A belief widely accepted for over 1500 years