The prototypical Seyfert galaxy M77 in Cetus is the brightest (magnitude 9) and closest (about 45 million light-years) of its class. Seyfert galaxies are named after American astronomer Carl Seyfert, who in 1943 created a list of galaxies that all have an exceptionally bright or starlike nucleus. Seyferts have a spectrum dominated by prominent emission lines, which originate from interstellar gas being heated near the galaxy’s nucleus by a supermassive black hole.
In 2018, the Atacama La