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Will the Sun Ever Burn Out? We Asked a NASA Expert

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Will the Sun ever burn out?

We Asked a NASA Scientist.

Well, the Sun, just like the stars we see at night,

is a star.

It's a giant ball of super hot hydrogen.

Gravity squeezes it in and it creates energy,

which is what makes the Sun shine.

Eventually, it will use up all of that hydrogen.

But in the process, it's creating helium.

So it will then use the helium.

And it will continue to use

larger and larger elements

until it can't do this anymore.

And when that happens,

it will start to expand

into a red giant

about the size of the inner planets.

Then it will shrink back down

into a very strange star called a white dwarf —

super hot,

but not very bright

and about the size of the Earth.

But our Sun has a pretty long lifetime.

It's halfway

through its 10-billion-year lifetime.

So the Sun will never really burn out,

but it will change and be a very, very different

dim kind of star

when it reaches the end of its normal life.

We Asked a NASA Scientist.

NASA. A NASA 360 Production.

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YouTube Transcript:Will the Sun Ever Burn Out? We Asked a NASA Expert

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Will the Sun Ever Burn Out? We Asked a NASA Expert