This is where the review gets interesting. Modern astronomy has discovered objects that are technically closer, but they confuse the terminology.
: Data from the NASA Hubble Space Telescope suggests that the brilliant glow of Mrk 231 isn't powered by just one supermassive black hole, but two. These two behemoths are locked in a frantic orbital dance, likely the result of two galaxies merging together. nearest quasar to earth
Through a large amateur telescope (20 inches or more), it appears as a stellar point of light with a faint, non-uniform halo that hints at spiral arms being disrupted by a past galactic merger. The Distant Competition: 3C 273 This is where the review gets interesting
Meet Markarian 231: Earth's Nearest Cosmic Powerhouse When we think of "nearby" space, we usually think of the Moon, Mars, or maybe the nearest star, Proxima Centauri. But if you zoom out—way out—you’ll find , the nearest quasar host galaxy to Earth . These two behemoths are locked in a frantic
While most quasars are found in the distant, ancient universe, Mrk 231 gives astronomers a front-row seat to one of the most violent phenomena in space. Here’s what makes it a scientific superstar:
Because Centaurus A is so close (cosmically speaking), it serves as a "laboratory quasar." Distant quasars are tiny pinpricks of light; we cannot resolve their internal structure. But Centaurus A is close enough that radio telescopes like ALMA (Atacama Large Millimeter/submillimeter Array) and space-based X-ray observatories can resolve the base of its jet, the feeding filaments of the black hole, and the shockwaves where the jet slams into the galaxy's interstellar medium.
At roughly , "near" is a relative term. However, in a universe that spans billions of light-years, Mrk 231 is practically in our backyard. What Makes Mrk 231 So Special?