  In the 1960s, it has been substantiated that an equation of Schrodinger type
could describe the diffusion phenomena, and the main consequence from this
finding has been that there would be wave property in the diffusion processes
as well. This theory has been immediately proved through laboratorial
experiments. Afterwards the theory was applied to the primordial nebula which
was thought to surround the protosun, and has found the consistency of the
prediction of the theory with current distance distribution of the planets to
be excellent. At the end of 20th century new satellites of planets were
discovered. On the basis of the new data, the theory is tested thoroughly and
the result allows us to come to the conclusion that the basic process for the
distances of the planets from the protosun to be determined has been the
diffusion of the primordial nebula consisting of mainly molecular gas.
