Scientists have created the first map of black holes

An international team of astronomers led by Francesco de Gasperin of the University of Hamburg and including two Polish scientists, Krzysztof Chyży of the Jagiellonian University and Katarzyna Małek of the National Centre for Nuclear Research, has created the largest and most accurate map of the sky observed at ultra-low radio frequencies. The map, published in the journal Astronomy and Astrophysics, reveals more than 25,000 active supermassive black holes located in distant galaxies.