Johannes Kepler

Notable German astronomer who formulated and verified the three laws of planetary motion, now known as Kepler's laws, based on the calculations of Tycho Brahe. In 1618-1621 he published the first astronomy textbook based on Nicolaus Copernicus' theory of the solar system, Epitome of Copernican Astronomy. Kepler's theories and observations were important to to the work of Sir Isaac Newton.

Noted German astronomer and mathematician. He was considered the founder of modern astronomy as he had formulated three laws to clarify the theory that the planets revolve around the sun. These laws are named Kepler's Laws after their creator.

• The orbit of Saturn
  
  • A cube inscribed in the sphere
    
    • the orbit of Jupiter: A sphere inscribed in the cube
      
      • A tetrahedron inscribed in that sphere
        
        • The orbit of Mars: A sphere inscribed in the tetrahedron
          
          • A dodecahedron inscribed in that sphere
            
            • The orbit of the Earth; a sphere inscribed in the dodecahedron
              
              • An icosahedron inscribed in that sphere
                
                • The orbit of Venus inscribed in the icosahedron
                  
                  • An octahedron inscribed in that sphere
                    
                    • The orbit of Mercury inscribed in the octahedron.