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De revolutionibus orbium coelestium
De revolutionibus orbium coelestium
(
On the Revolutions of the Heavenly Spheres
) is the seminal work on the
heliocentric theory
of the
Renaissance
astronomer
Nicolaus Copernicus
(1473–1543). The book, first printed in 1543 in
Nuremberg
,
Holy Roman Empire
, offered an alternative model of the universe to
Ptolemy
's
geocentric system
, which had been widely accepted since ancient times.
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