two additional factoids from the press release:

“The Abell 85 cluster of galaxies, consists of more than 500 individual galaxies, is at a distance of 700 million lightyears from Earth.”
“The ultra-massive black hole sits in the middle of the central galaxy Holm 15A.”

Serendipitously (although slightly tangential) while looking for new & interesting lectures over the weekend, came across this one. (but have not watched it through yet.)

Eva Silverstein & Roger Blandford
“The Physics and Astrophysics of Black Holes and Horizons”
Stanford University” Applied Physics/Physics Colloquium
November 13, 2019
https://youtu.be/yg38-Dpavaw
1:12:49

“One of the most striking predictions of the general theory of relativity is the formation of black hole and cosmic horizons sequestering different regions of spacetime. In this talk we will overview recent theoretical and observational developments in this area. At the classical and quantum level, radiation plays an important role in observations and thought experiments. Hawking’s result that black holes radiate raises serious puzzles, while its analogue in early universe cosmology yields a successful quantum theory of the origin of structure. The pursuit of a complete theory of quantum gravity has led to qualitatively new lessons about emergent spacetime structure in the presence of horizons. Turning to observations, the proposition that black holes with masses from three to ten billion times that of the sun are quite common in the universe grew from a conjecture to a conviction.”