In what possible way can the sun never run out of fuel to continuously produce nuclear fusion?

Thank you Disgruntledstudent for your answer but you are missing something. Is there not things within the solar system that possibly supplies the sun with fresh food and fuel all the time?

Thank you Kim for your answer but you are comparing what happens to massive and supermassive stars to the small star we call the sun. The sun burns through its fuel at much slower rates and there are things that sustain the sun providing enough fresh fuel to offset its rate of nuclear fusion rate where it will never convert iron. More massive stars receive the same fresh fuel source but they still burn off their fuel too fast to balance out or offset their output. Again, from where does this fuel come?

Disgruntledstudent the sun becoming a red giant is a theory not a fact. The sun has the potential for indefinite existence because of the constant amount of fresh fuel which offsets its output of energy. On what does the sun feed? Here is a clue. Planets, especially the earth, feed and refuel from the same source.

Life kind of sucks you need your ears and mind examined, you should refrain from speaking before you think.

The sun is a fifth generation star and is a very small star which gives it the potential to last indefinitely. How could this be possible?

I will reveal my thoughts before time exires. :)

aDz thank you for your opinion. :)

Here is a clue. The sun feeds or refuels by the same things that planets do from within their own solar system.

The ANSWER: The sun constantly receives hydrogen from within the solar system (as it moves through the galaxy and, coincidentally, the galaxy moves through space) along with tons of food or fuel in the form of comets, asteroids and meteors which balance its energy output whereas it will be sustain indefinitely. Larger stars receive such also but they still burn through their fusion process faster than the amount they receive.

The ANSWER: The sun constantly receives hydrogen from within the solar system (as it moves through the galaxy and, coincidentally, the galaxy moves through space) along with tons of food or fuel in the form of comets, asteroids and meteors which balance its energy output whereas it will be sustain indefinitely. Larger stars receive such also but they still burn through their fusion process faster than the amount they receive.