What was the Achievement of Copernicus?

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How did scientists in the sixteenth and seventeenth centuries challenge the ideas of the past? 2. What was the achievement of Copernicus? 3. Why did Galileo find it impossible to believe that the earth was the center of the universe? 4. Why was Galileo upset about how the crowd he encountered decided on the number of teeth in a horse’s mouth? 5. Why did Galileo tell the Inquisitors that he was wrong, and the earth was the center of the universe? UNDERSTANDING THE STORY