Nicolaus Copernicus

Scientist

1473-02-19

Books by Nicolaus Copernicus

On the Revolutions of Heavenly Spheres
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On the Revolutions
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Three Copernican Treatises

The Commentariolus of Copernicus, the Letter Against Werner, the Narratio Prima of Rheticus
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Quotes by Nicolaus Copernicus

I shall now recall to mind that the motion of the heavenly bodies is circular, since the motion appropriate to a sphere is rotation in a circle.
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Moreover, since the sun remains stationary, whatever appears as a motion of the sun is really due rather to the motion of the earth.
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I am aware that a philosopher's ideas are not subject to the judgment of ordinary persons, because it is his endeavour to seek the truth in all things, to the extent permitted to human reason by God.
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The earth together with its surrounding waters must in fact have such a shape as its shadow reveals, for it eclipses the moon with the arc of a perfect circle.
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For a traveler going from any place toward the north, that pole of the daily rotation gradually climbs higher, while the opposite pole drops down an equal amount.
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To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.
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Finally we shall place the Sun himself at the center of the Universe.
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Therefore, when I considered this carefully, the contempt which I had to fear because of the novelty and apparent absurdity of my view, nearly induced me to abandon utterly the work I had begun.
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Although all the good arts serve to draw man's mind away from vices and lead it toward better things, this function can be more fully performed by this art, which also provides extraordinary intellectual pleasure.
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Of all things visible, the highest is the heaven of the fixed stars.
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Mathematics is written for mathematicians.
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