Hacker News·4 min read·hard
An all-sky map of half a million supermassive black holes
M
MarcoDewey
✦AI Summary
The Sloan Digital Sky Survey has released its 20th data set, providing an unprecedented map of 500,000 supermassive black holes. This project combines optical spectroscopy with X-ray data to better understand the growth and physics of active galactic nuclei.
The Black Hole Mapper reaches a milestone with its first southern hemisphere optical observations, coordinated eROSITA X-ray identification, and multi-epoch tracking of accreting black holes across the universe.
sciencetechnology
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