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en.wikipedia.org/wiki/Stellar_evolution

Stellar evolution is the process by which a star changes over the course of time. Depending on ... This process causes the star to gradually grow in size, passing through the subgiant stage until it reaches the red giant phase. ... Both types, deuterium-burning and not, shine dimly and die away slowly, cooling gradually over ...

science.howstuffworks.com/star6.htm

... looking at? Learn what stars are and how they live and die! ... At some point after this, the core will become hot enough to cause the helium to fuse into carbon.

discoverykids.com/articles/what-happens-when-stars-run-out-of-fuel

How do stars die? ... This is what happens when a normal-sized star dies. ... The star's gravity causes it to collapse, and then it explodes into a supernova. What's  ...

www.universetoday.com/24186/how-does-a-star-die

Jan 26, 2009 ... Secondly, and more commonly, the core of the star can still be surrounded by some layers of hydrogen, which continue to fuse and cause the ...

www.answers.com/Q/What_causes_a_star_to_die

an average star spends 90 percent of its life as a hydrogen-burning, main- sequencestar. Once the hydrogen fuel in the star's core is depleted, it evolves rapidly ...

www.universetoday.com/25337/why-do-stars-die

Stars are mostly balls of hydrogen gas that came together from a nebula of gas and dust. They generate their energy through the process of fusion. This is where  ...

www.quora.com/What-causes-the-death-of-a-star

Stars with mass less than or equal to the mass of our Sun usually "die" a peaceful death. By peaceful I mean that when they have burned all of their hydrogen ...

spacen14.imascientist.org.uk/2014/11/19/what-causes-a-star-to-die

Nov 19, 2014 ... Heather Campbell answered on 19 Nov 2014: Its basically when the star runs out of fuel to keep it going. If we take a star like our sun then:

thescienceexplorer.com/universe/many-ways-star-can-die

Oct 13, 2015 ... On closer inspection, we can predict the unique fate for each star, ... Eventually, the internal pressure causes a region to condense into a hot, ...

abyss.uoregon.edu/~js/ast122/lectures/lec18.html

The sudden stoppage of energy generation causes the core to collapse and the outer layers of the star to fall onto the core. The infalling layers collapse so fast ...