Nicolaus Copernicus · Science
The single idea that reordered the universe: take the Earth out of the centre, put the Sun there, and let our world become just another planet. How a cautious cleric quietly overturned two thousand years of cosmology.
You learned that Copernicus proposed the Sun, not the Earth, at the centre of the cosmos, with the Earth a spinning planet orbiting it. In your own words, explain what Copernicus actually claimed, and why moving the Earth from the centre was a far more radical step than it might seem to us today.
Leads to Ptolemy.
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