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Protostar life cycle
born
when the temperature of a protostar gets high enough, it can begin thermonuclear fusion of hydrogen into helium. High mass protostars reach this stage much faster than low mass protostars. Mass falling onto the the star forms an accretion disk around it.
sad stars
protostar growth
As these clumps form, they become the cores of protostars. They become the core of protostars, and the area they form is hosting many protostars at once. As these cores condence, thier tempeture rise and they contuine to accrete matter from the clouds around them. They begin to glow because of there temeture increses
stars with too little mass never beign the process of the thermonuuclear fusion. These stars grow to become brown dawrfs instead of the main sequance star. Stars with too much mass also never reach the main sequance star. They gain such a large internal pressure that outer layers of the star areexpelled and it becomes disrupetd
Bi poler out flow
During the T Thuri stage of a star mass is ejected into the bipolar outflow around it. This causes wind that blows away any remaining parts of the cloud that once surrounded the star, and the star becomes visable in space. This ejected mass may produce a shock wave large enough to trigger star formation in nerby intersteller material. The star stops gaining and losing mass and reaches hydrostaic equilibrium as a main sequance star.
birth of a star
star bith can be triggered in many different way . with the dark nebulea, atoms may start to clump togather because of gravity between them. When the star dies, an expanding supernova remnant may colide with an intersteller cloud and force compression of material. Two intersteller clouds can also collide and create compression, Whichever ways it happens protostars form when intesteller material combines togather in clumps