ON THE RADIAL-DISTRIBUTION OF MATTER IN T HE PROTOPLANETARY NEBULA

Radial distribution of mass and chemical composition of a gas assumed as an initial in relation to the Solar system formation are obtained. The former is practically in coincidence with the positions, masses an d compositional trends of planets. The calculated dynamical parameters such as inertia moment and impulse moment are corresponding to measur ement planetary data. The energy of gas expulsion having a mass equiva lent to the total mass of all planets is estimated. This energy should be radiated by the Sun in approximately 10(3) years. In accord with t he density distribution within the heliocentric sphere three groups in relation to radial compositional trends as following: iron-silicate, methane-hydrogenic, hydrogen-silicate. The modeling is concerned as a general approach, thus the trimodal mass and compositional distributio n of gas should be applied to all solar-like stellar type.