If gravitational condensate stars (or gravastars) actually existed, they would look similar to black holes to a distant observer.
If gravitational condensate stars actually existed, they would look similar to black holes to a distant observer. Two theoretical physicists have now found a new solution to Albert Einstein's theory of general relativity, according to which gravitational stars could be structured like a Russian matryoshka doll, with one gravastar located inside another.
This could be a reason why Schwarzschild's solution did not attract much attention outside the theoretical realm for a long time -- that is, until the first candidate for a black hole was discovered in 1971, followed by the discovery of the black hole in the center of our Milky Way in the 2000s, and finally the first image of a black hole, captured by the Event Horizon Telescope Collaboration in 2019.
Daniel Jampolski, who discovered the solution as part of his Bachelor's thesis supervised by Luciano Rezzolla, says:"The nestar is like a matryoshka doll," adding that,"our solution to the field equations allows for a whole series of nested gravastars.
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