Stellar Evolution (of sun-like stars). How do stars age & die?. The Main Factor. The evolution of any star is controlled by its mass . Mass controls gravity. Gravity controls density. Density controls how fast the star uses up its available fuel.
How do stars age & die?
9 billion years later,sun ends its middle- aged life here.
Sun starts its middle-age
He C in core) the sun grows hotter and turns yellow again.
nebula might look
like this from the
surface of Pluto!