This is the most comprehensive X-ray map of the sky ever made

Amazing stuff and more is to come!



Will this also be the end of dark matter like the previous and recent discovery of massive amounts of thinly spread intergalactic matter (blogged here about it)?



"The map, released June 19, is based on data from the first full scan of the sky made by the eROSITA X-ray telescope onboard the Russian-German SRG spacecraft, which launched in July 2019. The six-month, all-sky survey, which began in December and wrapped up in June, is only the first of eight total sky surveys that eROSITA will perform over the next few years. But this sweep alone cataloged some 1.1 million X-ray sources across the cosmos — just about doubling the number of known X-ray emitters in the universe. ... eROSITA’s new map reveals objects about four times as faint as could be seen in the last survey of the whole X-ray sky, conducted by the ROSAT space telescope in the 1990s ... “At present, we probably know about a little less than 8,000 clusters of galaxies,” ... But over its four-year mission, eROSITA is expected to find a total of 50,000 to 100,000 clusters. In the first sweep alone, it picked up about 20,000."



This is the most comprehensive X-ray map of the sky ever made | Science News A new map of the entire sky, as seen in X-rays, looks deeper into space than any other of its kind.