Some of the gas sent gas away from the supermassive black hole — which is located in the center of the galaxy cluster SDSS J1531+3414 (SDSS J1531 for short) — by the eruption eventually cooled enough to form numerous clusters of stars. Multiwavelength image of the massive galaxy cluster SDSS J1531+3414. Image credit: NASA / CXC / SAO / Omoruyi et al. / STScI / Tremblay et al. / ASTRON / LOFAR / NASA / CXC / SAO / N. Wolk. SDSS J1531 is...