Not a few other very eminent and scholarly men made the same request, urging that I should no longer through fear refuse to give out my work for the common benefit of students of Mathematics.

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• Nicolaus Copernicus:

  So, influenced by these advisors and this hope, I have at length allowed my friends to publish the

• Nicolaus Copernicus:

  Therefore I would not have it unknown to Your Holiness, the the only thing which induced me to look

• Nicolaus Copernicus:

  Those things which I am saying now may be obscure, yet they will be made clearer in their proper pl

• Nicolaus Copernicus:

  Therefore, in the course of the work I have followed this plan: I describe in the first book all th

• Nicolaus Copernicus:

  For it is the duty of an astronomer to compose the history of the celestial motions through careful

• Nicolaus Copernicus:

  Therefore, having obtained the opportunity from these sources, I too began to consider the mobility

• Nicolaus Copernicus:

  Although all the good arts serve to draw man's mind away from vices and lead it toward better thing

• Nicolaus Copernicus:

  First of all, we must note that the universe is spherical.

• Nicolaus Copernicus:

  The earth also is spherical, since it presses upon its center from every direction.

• Nicolaus Copernicus:

  For a traveler going from any place toward the north, that pole of the daily rotation gradually cli