Ships And Sails Proper For The Heavenly

Astronomy Would Not Provide Me With Bread If Men Did Not Entertain Hopes Of Reading The Future In The Heavens.

So, Fabricius, I Already Have This: That The Most True Path Of The Planet [mars] Is An Ellipse, Which Dürer Also Calls An Oval, Or Certainly So Close To An Ellipse That The Difference Is Insensible.

On How The Motion Of A Planet Defines Its Sphere: ... And Thus It Comes About Gradually By The Linking And Accumulation Of A Great Many Revolutions That A Kind Of Concave Sphere Is Displayed, Having The Same Center As The Sun, Just As By A Great Many Circles Of Silken Thread, Linked With Each Other And Wound Together, The Dwelling Of A Silkworm Is Made.

[quantity Is The Fundamental Feature Of Things,] The 'primarium Accidens Substantiae,' ...prior To The Other Categories.

The Roads By Which Men Arrive At Their Insights Into Celestial Matters Seem To Me Almost As Worthy Of Wonder As Those Matters In Themselves.