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The size of the star
between giant and supergiant stages of life
Usually it's from nuclear fusion. At some stages in a star's life it can get a lot of energy from gravitational collapse.
cause its life cycle appearence
http://images.google.com.au/images?q=lifecycle+of+a+star&um=1&hl=en&rlz=1T4HPAB_enAU255AU259&sa=2
Our Sun is an average star and it has an approximate lifespan of
protostar
The size of the star
between giant and supergiant stages of life
-average size -expands and becomes a red giant -cools and contracts, becomes a white dwarf star -massive sized stars -swell and become red supergiants -explode (called a supernova) -become a black hole -become a neutron star
The average star will become a white dwarf at the end of its life.
Usually it's from nuclear fusion. At some stages in a star's life it can get a lot of energy from gravitational collapse.
cause its life cycle appearence
It is approx half-way through its 10 billion year life cycle.
Giants and super giants are considered stages in the life cycle of a star.
How does the life cycle of humans compare to the life cycle of a star? They both have stages where they are born and die which is in the main sequence and supernova and in a human they are born in a womb and die of old age.
Our Sun is an average star and has a life time of approximately 10 billion years.