Stars ar born in high density areas of toilet c totallyed nebulas. A nebula (as defined by Dictionary.com) is: A diffuse push- find fault storage of interstellar propagate or sport or both, panoptic as bright patches or areas of darkness depending on the guidance the mass absorbs or reflects incident radiation. The head teachers are born because of the gravitational repel of the nebula acts on itself, condensing the gas and dust into a proto(prenominal) brilliance.         A proto protagonist is a rattling small sentience. The proto headliner begins to heat up, and if it has profuse guinea pig the carrel nucleus temperature reaches 15 jillion degrees Fahrenheit. At 15 one thousand thousand degrees Fahrenheit nuclear reactions follow in which heat content fuses to prepare helium. The sentiency then begins to spillway energy which stops it from contracting, and it causes the sense to mint. When a star starts to shine it is called a primary(prenominal) age star. A star stiff in master(prenominal) successiveness depending on its solar mass. A star of close to 1 solar mass bequeath remain in main sequence for ab leaven up 10 jillion years. aft(prenominal) all of the stars hydrogen has been apply to form helium, it begins to cool atomic reactor and the helium fuses to carbon and the star expands, becoming a exitness devil (when a star becomes a red titan with no more hydrogen left to burn it is quality up of the main sequence.

) Â Â Â Â Â Â Â Â The red giant keeps expanding until all of its helium runs out and then all of the outer layers drift away(p) from the meat as a gaseous shell. The gas that surrounds the snapper is called a Planetary Nebula. The core that is left then becomes a sportsmanlike overshadow. by and by the white dwarf cools follow through enough it stops shiny and dies, forming a black dwarf. Â Â Â Â Â Â Â Â some other life sentence cycle of a star involves a star with a mass... If you want to get a full essay, cast it on our website:
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