The supermassive black hole at the heart of our galaxy spat out an enormous flare of radiation 3.5 million years ago that would have been clearly visible from Earth.
Source:
https://phys.org/news/2019-10-dormant-volcano-black-hole-heart.html
Only the Autodidact is Free
The supermassive black hole at the heart of our galaxy spat out an enormous flare of radiation 3.5 million years ago that would have been clearly visible from Earth.
Source:
https://phys.org/news/2019-10-dormant-volcano-black-hole-heart.html