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It will expand into a red giant, swelling to many times larger than its current state. It will engulf Mercury, Venus, and perhaps Earth. After around a million years like that, it will collapse into a white dwarf star, about the size of earth but much more dense.

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Q: What happens to the sun once it used up all the fuel in the core?
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What happens to a sun like like star after it has used up all its core fuel?

Once a sun-like star has used up almost all of the hydrogen in it's core it will start to burn helium as well. This starts it's Red Giant phase which drastically increases the size of the star to hundreds of it's original size. Once the star has used up all available fuel it will contract down to the size of the Earth. While shedding it's outer layers into a Nebula. The Star is now a White Dwarf and will slowly fade into a Black Dwarf after trillions of years.


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You have a misapprehension there, it is uranium oxide that is used in fuel rods, not fossil fuel


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No, it is a fossil fuel. Once it is used, it is gone.


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The external tank is dropped once the fuel is used up in the tank.


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Because the fuel is not used its energy is called potential energy and remains stored in the fuel until something initiates the process of ignition or energization.


What happens to the energy from a fuel that thAt is not used to perform work?

Because the fuel is not used its energy is called potential energy and remains stored in the fuel until something initiates the process of ignition or energization.


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What happens to a suns like star after it has used up all the fuel in its core?

Once a sun-like star has used up almost all of the hydrogen in it's core it will start to burn helium as well. This starts it's Red Giant phase which drastically increases the size of the star to hundreds of it's original size. Once the star has used up all available fuel it will contract down to the size of the Earth. While shedding it's outer layers into a Nebula. The Star is now a White Dwarf and will slowly fade into a Black Dwarf after trillions of years.


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