Comment by vintagedave
2 days ago
'Bubbles' could imply something like space-time changes, and in face a couple of comments speculatively / hopefully read them like this: [1], [2]
But they're (sadly?) much simpler: Spitzer bubbles 'are formed by radiation and winds from massive stars, which carve out holes within surrounding dust clouds.'
So really just the blast radius!
This notion appears in Death's End by Liu Cixin (sequel to the sequel to The Three Body problem).
What notion?
Bubbles of expanding change in the structure of spacetime. Spoiler ahead. In the book, under the "Dark Forest" game theory setting, super advanced civilizations wipe lesser ones out in increasingly complex ways, for example, triggering a spacetime flattening in the target solar system, creating a bubble where s-t collapses into 2D. Also, scars in s-t when reckless young civilizations use FTL technology.
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