There Is a Black Hole at the Centre of Our Galaxy

Night Science Stories · Nov 6, 2026 · 2h 24m · transcript

At the very heart of our Milky Way galaxy lies an invisible giant: a supermassive black hole known as Sagittarius A*. With a mass approximately four million times greater than our Sun, it dominates the gravitational environment at the center of our galaxy.

But how did scientists discover something that emits no light? By watching stars move around an invisible object, astronomers found compelling evidence of an enormous concentration of mass. In 2022, the Event Horizon Telescope collaboration revealed the first image of Sagittarius A*, giving humanity a direct view of its dark central shadow…