5) Each element is unique and different from other ...

Earth as the densest element, naturally sinks to the center of the universe and forms a sphere, the perfect shape. Copernicus and Heliocentrism: Copernicus believed that it would be appropriate if the sun were in fact the center of the universe. So he began working on a heliocentric system, placing the planets on spheres moving out from the sun ... ................
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