Kepler’s discovery of elliptical orbits “rock the scientific community because it challenged the theory that the planets orbits in a perfect circle.
This discovery rocked the scientific community because earlier everyone thought that planets orbit around the sun in a perfect circle, which was challenged by Kepler's discovery.
The quote from the text which prove this point is "Up until this time, Copernicus' theory that the planets move in circular orbits around the sun was considered the most accurate theory".
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