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New calculations: Earth likely won't burn up when the Sun turns into a red giant — it will move away to a safe distance.
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The Sun will swell and could swallow Earth, but new tidal models give a chance: the planet might survive. The key factor is the star's mass-loss rate. Observations of the star L2 Pup inspire optimism.
🎯 The density of the outer layers of a red giant is comparable to the best laboratory vacuum. If Earth ended up inside, it wouldn’t burn up — it would float in the tenuous cloud, like in a fog.