  Planets are common objects in the Universe, observationally as well as
theoretically. However, the standard theory of their formation encounters many
difficulties, such as dust fall and disk lifetime problems. We positively
analyze them, expecting that those problems as a whole may indicate some
consistent effective model. Thus we propose a dynamical model of the planet
formation based on the assumption that the inner void of gas is commonly formed
in the disk without specifying any Physical origin. The basic processes of this
model are the dust fall, the accumulation, and the slingshots. The dust in the
protoplanetary disk rapidly falls as it grows to the meter size. Then, all of
them stops at the outer edge of the void where the gas friction disappears.
Such dust clusters rapidly coalesce with each other and easily cause the
runaway in the dense and coherent environment. Then the huge clusters are
formed there and they are the first generation planets Hot-Jupiters. They
immediately slingshot smaller clusters around them towards the outer regions.
They are Rockey-Planets, Cold-Gas-Giants, Ice-Giants, and `Trans Neptunian
objects including `Kuiper belt/Oort cloud objects`, depending on the original
core mass or the distance blown. Combining numerical calculations of the
slingshots and coagulation equations, we obtain the planet population diagram,
including the possibility of the massive thermal metamorphosis, the origin of
the variety of planetary systems, and the possibility of stray planets/objects.
