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The Sun and Earth in the distant future Fate of the planets

The Sun and Earth in the distant future Fate of the planets. So – it appears that Mercury and Venus get swallowed, but the other planets escape. Is that the whole story? No – orbital angular momentum is NOT conserved: tidal interaction and dynamical friction act to decrease it. Assuming the Sun is non-rotating on the RGB (conservation of its AM), the orbital motion of the Earth raises a tidal bulge on the Sun that pulls the Earth back in its orbit. In addition, the Earth is orbiting through the extended chromosphere of the Sun, giving rise to drag. Detailed computations give:

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