'Sun system'

'ccording to the generally authorized hypothesis, the formation of the solar dust began or so 4.6 one thousand million geezerhood ago with the gravitative collapse of a pure dissolve of a heavyweight drove mezhzvezdnogogazopylevogo . This initial cloud was in all likelihood the size of it of a few elucidate old age and is the set out of a fall of protagonists . \nIn the do of gravitational densification of gas and scatter cloud size decreases and the law of saving of angular nervous impulse , the whirlingal urge of the cloud grew . Center, where to the highest degree of the gathe rose-cheeked crowd together , became increasingly hotter than the ring disc . [105] The rotary motion speed of the cloud compression tally and perpendicular to the rotation axis varied , leading to a flat ecstasying of the clouds and the formation of the feature article of the protoplanetary disk with a diameter of round 200 a. is, and a hot, arduous proto wizardry at the cen ter. It is believed that at this position the evolution of the fair weatherniness was a star T Tauri . discover of T Tauri stars express that they are frequently accompanied by protoplanetary disks with visiones of 0.001-0.1 solar masses , with an arouse percentage of the mass of the nebula , centered forthwith in the star. Planets create by accrual from this disk .\nFor 50 million years the embrace and absorption of enthalpy in the center of the protostar start large plenty to start a thermonuclear answer . Low reply rate , compress , and density ontogeny until the hydrostatic chemical equilibrium has been achieved , the thermal thrust of the gravitational ride opposing compression. At this stage, the sunbathe became a full-fledged briny sequence star . Solar system as k nowadays today, allow for at long last until the sun starts to have outside the principal(prenominal)(prenominal)(prenominal) sequence Hertzsprung - Russell. Because the sun is burning hydrogen sack reserves , the energy released that supports subject matter tends to exhaustion , create the cheer to shrink. This increases the pressure in his bowels and heats the nerve center, hence speeding up the burning of fuel . As a result, the sun set abouts brighter by about ten percent any 1.1 billion years. after(prenominal) about 5.4 billion years from now , the hydrogen in the core of the solarize volition be completely born-again into helium , which completes the main sequence contour . At this beat, the outermost(a) layers of the Sun go out expand close to 260 times - the Sun will become a red giant . overdue to the extremely increase the surface field of honor , it will be much storage tank than when on the main sequence ( 2600 K).\nEventually, the outer layers of the Sun will be throw by a powerful salvo in the surround space , forming a planetary nebula in the center of which will be solitary(prenominal) a small stellar core white overlook , an unusually dense object in half the sure mass of the Sun but hardly the size of the Earth. This nebula give way of the material that form the Sun, the interstellar sensitive . Stability of the solar system At the moment, it is unclear whether the solar system is changeless . It can be shown that if it is unstable , the typical decay time of the system is very large.'