Karl Schwarzschild

What is a white hole? Does the cosmic phenomenon exist?

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Black holes have long been in the spotlight as celestial bodies from which nothing, not even light, can escape. However, theoretical physicists propose a less understood but equally fascinating counterpart: the white hole. Unlike black holes, which attract matter, white holes repel matter. What are white holes? In astrophysics, a white hole represents a theoretical … Read more

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

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A newly developed solution to the equations at the heart of Albert Einstein‘s most revolutionary theory suggests that hypothetical stars called “nestars” could be made of 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 … Read more