Therefore, Having Obtained The Opportunity From These

We Regard It As A Certainty That The Earth, Enclosed Between Poles, Is Bounded By A Spherical Surface.

Those Who Know That The Consensus Of Many Centuries Has Sanctioned The Conception That The Earth Remains At Rest In The Middle Of The Heavens As Its Center, Would, I Reflected, Regard It As An Insane Pronouncement If I Made The Opposite Assertion That The Earth Moves.

For It Is The Duty Of An Astronomer To Compose The History Of The Celestial Motions Through Careful And Expert Study.

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.

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.