First Of All, We Must Note That

In The Midst Of All Dwells The Sun.

Mathemata Mathematicis Scribuntur Mathematics Is Written For Mathematicians De Revolutionibus

For When A Ship Is Floating Calmly Along, The Sailors See Its Motion Mirrored In Everything Outside, While On The Other Hand They Suppose That They Are Stationary, Together With Everything On Board. In The Same Way, The Motion Of The Earth Can Unquestionably Produce The Impression That The Entire Universe Is Rotating.

Not Only The Phenomena Of The Others Followed From This, But Also It So Bound Together Both The Order And Magnitude Of All The Planets And The Spheres And The Heaven Itself, That In No Single Part Could One Thing Be Altered Without Confusion Among The Other Parts And In All The Universe.

Hence I Feel No Shame In Asserting That This Whole Region Engirdled By The Moon, And The Center Of The Earth, Traverse This Grand Circle Amid The Rest Of The Planets In An Annual Revolution Around The Sun. Near The Sun Is The Center Of The Universe. Moreover, Since The Sun Remains Stationary, Whatever Appears As A Motion Of The Sun Is Really Due Rather To The Motion Of The Earth.