Black hole-like ‘gravastars’ could be stacked like Russian tea dolls


A newly developed solution to the equations at the heart of Albert Einstein’s most revolutionary theory suggests hypothetical stars called “nestars” could be made from stacked gravitational stars, or “gravastars,” like Russian tea dolls, also known as matryoshka dolls.

One of the most impressive things about Einstein‘s 1915 theory of gravity, general relativity, is just how many incredible cosmic objects its central equations have predicted.

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