There is a mystery in particle physics. What is the reason for the generations? What is the reason for the masses of the particles in the Standard Model. This paper shows that spinning sphere theory may explain the reason for the generations. In spinning sphere theory our universe starts with one particle for zero-dimensional point. Two particles for a one-dimensional string that corresponds to the Muon, Six particles for a two-dimensional ring, corresponding to the electron. 42 particles for the 2nd layer of a cuboctahedron for a three-dimensional particle, corresponding to the tauon. This paper specifically focuses on the muon. More papers will come for the electron and the tauon. This paper finds that the masses of the 2nd and 3rd generation particles, for the leptons, are related to the ratio of energies jumping from one orbital to another orbital. These are not the orbitals of the proton electron orbitals, but rather within their own fields. They could be orbitals within the leptons themselves. This theory also proposes that, like De Broglie waves, where matter has wave like properties, there are dark orbitals, where jumping between orbital becomes the matter that we observe when the wave function collapses. This theory of dark orbitals comes directly from the prediction for the masses of particles.