Three galaxies are colliding, and all of them are hiding something powerful at their core. This isn’t just rare. It’s unheard of.
A team of astronomers has confirmed the first known system where three galaxies are merging, and all three host radio-bright, actively feeding supermassive black holes. Known as J1218/1219+1035, the system is located about 1.2 billion light-years awa... [4562 chars]