because in this book he answered many of the arguments people had used against the idea of a moving earth.
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The written document containing Copernicus' total research is called "De Revolutionibus Orbium Coelestium" or "On the Revolutions of the Celestial Spheres." It was published in 1543 and outlined his heliocentric theory of the universe.
De Revolutionibus Orbium Coelestis (English: On the revolutions of heavenly spheres).
From Wikipedia: "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)."
No, Nicolaus Copernicus did not write Harry Potter. Harry Potter was written by J.K. Rowling, a British author, and it is a series of fantasy novels about a young wizard's adventures. Nicolaus Copernicus was a Renaissance-era astronomer known for developing the heliocentric model of the universe.
Copernicus published his heliocentric theory in 1543 in his book "De Revolutionibus Orbium Coelestium" (On the Revolutions of the Celestial Spheres).