... are from gamma-ray sources, such as supermassive black holes, gamma-ray bursts and the debris of supernova explosions. Finds that are part of the 3,000 new discoveries clocked up by Fermi since its launch; that is 10 times...
... spotted merging together. Stellar mass black holes form from the remnants of a large star that dies in a supernova explosion and considering the number of stars in our galaxy (as many as 200 billion stars or perhaps more have been...
... life as a white dwarf as it cools and dims. Stars above eight solar masses tend to end with a bang in a supernova explosion. If the core survives it can end up as a neutron star or contracts to become a black hole if the remaining core is much...
... begin their lives with more than about 8 times the mass of the Sun and end them in a supernova explosion that leaves behind a black hole." The discoveries of these triple systems with an inner pair and a distant...