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The gravitational pull of the sun tries to make it smaller and the heat produced by it tries the make it bigger.

So, they cancel themselves making the force null.

But, If you consider after the great fire dies in about 5000 million years, it will turn into a red giant bloated to about 100 times its current size, engulfing Mercury and Venus with us... :P Then, I guess it will grow bigger.

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13y ago

What else can I help you with?