Black holes spew out powerful jets that span millions of light-years. We’re trying to understand their whole life cycle

There is a supermassive black hole at the center of nearly every big galaxy—including ours, the Milky Way (it’s called Sagittarius A*). Supermassive black holes are the densest objects in the universe, with masses reaching billions of times that of the sun. There is a supermassive black hole at the center of nearly every big galaxy—including ours, the Milky Way (it’s called Sagittarius A*). Supermassive black holes are the densest objects in the universe, with masses reaching billions of times that of the sun. Astronomy Phys.org – latest science and technology news stories