It is commonly understood that the sun, at 4.567 billion years is in it's mid-life, or about 1/2 way through it's life expectancy.
Because thats the part of its life cycle it is now in.
middle age
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About 10 billion years. We are 4.5 billion years in now.
I think ur a gay. when you die the sun will end on its life cycle! :D >>>Jushki
dubstep
the sun is a cool wave