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Theoretical Gravastars Are Even Weirder Than Black Holes

Summary by kottke.org
TIL I learned about gravastars (aka a gravitational vacuum star), theoretical objects related to black holes. Both are massive & dense, but instead of a singularity surrounded by an event horizon, gravastars are made up of dark energy surrounded by a extremely thin shell of exotic matter. The shell of the gravastar is utterly dark and the coldest thing in the universe, only a billionth of a degree above absolute zero. If we look at it in deep in…
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kottke.org broke the news in on Thursday, May 1, 2025.
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