origin of the solar system
Questions of education and the formation of the solar system astronomers have troubled past.But first sufficiently substantiated the hypothesis of formation of the Sun and its surrounding planets was first proposed by the Soviet researcher O.Schmidt.The astronomer has suggested that the central star, which is paid by the giant orbit around the galactic center, was able to capture a cloud of interstellar dust.It cooled down dust formation and form a dense body, who subsequently became the planets.
Computer calculations performed by modern researchers, show that the mass of gas and dust cloud of primary education has been incredibly high.
Size originated in the cosmic expanse of clouds initially much higher than the current size of the solar system.Apparently, the substance from which the planets formed, was similar in structure to one that is typical for interstellar nebulae.The main part of this substance was the interstellar gas.
Revised data suggest that the formation of a system of sun and planets occurred in several stages.Planetary system was created in the same period, in which the formation of the sun.Initially, the central part of the cloud, not having stability shrank, becoming a so-called protostar.But the main mass of the cloud at the same time continued to rotate around the center.Gradually, the gas condenses, becoming solid.
evolution of the Sun and planets
process of formation of the solar system and its subsequent evolution occurs gradually and continuously.Large solids fall to the central part of the dust cloud.The remaining "speck", which was characterized by excessive torque, formed a relatively thin disk of gas and dust, which is more condensed, becoming flat.
cold clumps of matter collide, combining into larger bodies.This process contributed to the gravitational instability.The number of new bodies in the solar system, the future could be billions.It is because of such dense material objects eventually formed today's world.In it took many millions of years.
least massive planets were formed closer to the sun.But heavier particles of matter rushed to the center of the system.On rotation of the closest star to the planets - Mercury and Venus - strongly influenced by solar tides.At this stage of its evolution, the Sun is a typical main-sequence stars, emitting a steady stream of energy that is produced by nuclear reactions in the center of the star.Around the sun in orbits independent rotates eight planets, including the Earth is the third.