Supermassive black hole, Earth

The James Webb Space Telescope has captured a mid-infrared picture of Sagittarius A*, filling in a long-standing gap in ...
Galactic nuclei images reveal how supermassive black holes interact with their surroundings using infrared telescopes.
In 2018, a galaxy about 270 million light-years away from Earth exhibited a major increase in activity. It quieted down again by 2020 -- only to dramatically increase its output again in 2023. At that ...