Do you think the world will end one day?
Will the sun get too close and maybe melt everything?
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ArishMell · 70-79, M
It will but not quite like that.
Instead the Sun is predicted to expand as it "dies", as other stars of similar size have done. That could spread its extremely hot atmosphere out as far as the Earth or beyond. So even if the planet itself survives all life on it will be destroyed.
"One day" though is some thousands of millions of years from now.
The model you ask, that of the Sun and Earth approaching, would be the other way round. The Sun would not approach its planets but they might approach it. I don't if that could happen or if instead the planets would slowly spiral outwards, away from the Sun.
Instead the Sun is predicted to expand as it "dies", as other stars of similar size have done. That could spread its extremely hot atmosphere out as far as the Earth or beyond. So even if the planet itself survives all life on it will be destroyed.
"One day" though is some thousands of millions of years from now.
The model you ask, that of the Sun and Earth approaching, would be the other way round. The Sun would not approach its planets but they might approach it. I don't if that could happen or if instead the planets would slowly spiral outwards, away from the Sun.