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3-21-1543

Copernicus' De Revolutionibus published two months before its author died. The Polish astronomer had outlined his heliocentric theory in 1514 in a small booklet distributed to friends and announced it publicly in De Revolutionibus.

More information about:
Nicolaus Copernicus (1473-1543)
De Revolutionibus
Date: 
Sunday, March 21, 1543