The Hubble Space Telescope has stared deeper into a quasar than ever before ... The one Hubble studied, designated 3C 273, is one of the closest of these extreme objects to Earth.

Hubble’s image of Markarian 231 reveals the nearest quasar to Earth, 600 million light-years away, with two supermassive black holes. Hubble’s image shows a spiral galaxy passing through NGC 1275, ...