Sgr A*, at the heart of the Milky Way and clocking in at 4.3 million solar masses, is the closest supermassive black hole we have access to. It's also on the quiescent end of the activity scale, which ...
Sagittarius A* is the supermassive blackhole at the center of the MilkyWay. As supermassive blackholes go, it is fairly quiet. It’s not creating any galaxy-wide tantrums that should ...