Gravastars ...

Imagine celestial objects so odd they could be likened to cosmic Russian dolls, where one mysterious body is hidden inside another. This is precisely what researchers from Goethe University in ...

ABSTRACT: The images collected by the EHT of objects M87* and SgrA* show darkened, but not black areas. So that the immediate identification with supermassive black holes remains questionable.

ABSTRACT: The images collected by the EHT of objects M87* and SgrA* show darkened, but not black areas. So that the immediate identification with supermassive black holes remains questionable.

Some things in cosmology may simply be unknowable. Why is there something rather than nothing? What lies outside the universe? What is inside a black hole? That last one has been niggling at ...

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, ...

A gravastar, just like a black hole, consists of an extremely dense core. It is made up of three regions. The core or inner region consists of densely packed dark energy. Ultra-relativistic stiff ...

Using the effective field theory of quantum gravity at second order in curvature, we calculate quantum corrections to the metric of gravastars and the closely related dark energy stars. We find that ...

Kurzgesagt, a popular science-related YouTube channel with over 23 million subscribers, explains about ' Gravastars,' which are like twins of black holes. Gravaster is a cosmic soap bubble-like entity ...

(via Kurzgesagt) Gravastars could change how we think about the universe. These cosmic objects solve black holes’ biggest problems without breaking physics. From their ultra-thin shell to their energy ...