Stellar mass black holes may not be black holes at all. Instead, they could be a type of extremely compact star called a gravastar, which mimics a black hole. This is according to theoretical phsyicists who have discovered a solution to Einstein's Theory of G…
One foundational part of astrophysics concerns how stellar mass black holes form. When a star several times more massive than our Sun runs out of fuel for fusion, the outward pressure from fusion dec… [+6166 chars]