Nearest Quasar -

: At its core, the quasar is powered by a supermassive black hole. Intriguingly, observations from the Hubble Space Telescope suggest Mrk 231 may actually host a binary black hole system , consisting of one massive central black hole and a smaller companion orbiting it.

Mrk 231 is a (its broad emission lines are visible). It is relatively low-luminosity for a quasar but still incredibly energetic:

The nearest quasar is a topic of significant interest in astrophysics, as quasars are among the brightest and most distant objects in the universe. A quasar (Quasi-Stellar Radio Source) is an incredibly luminous object thought to be a distant galaxy with a supermassive black hole at its center. This black hole is actively accreting material, which heats up and releases enormous amounts of energy across the electromagnetic spectrum, making quasars visible from vast distances. nearest quasar

| Object | Type | Distance | Notes | |--------|------|----------|-------| | | Quasar | 581 million ly | True quasar; hosts powerful, persistent accretion disk & outflows | | 3C 273 | Quasar | 2.4 billion ly | Brighter and more famous, but not nearest | | Sagittarius A * | Supermassive black hole | 26,000 ly | Our galaxy's center; not a quasar (extremely low luminosity today) | | Centaurus A | Radio galaxy / AGN | 10–16 million ly | Nearest powerful AGN, but not a quasar (jet-dominated, nucleus obscured) |

The nearest known quasar to Earth is .

Observing quasars, especially those that are relatively close by (in cosmological terms), provides valuable insights into the evolution of supermassive black holes and their host galaxies. However, detecting and studying quasars at large distances is challenging due to their faintness and the fact that their light is redshifted (shifted towards the red end of the spectrum) due to the expansion of the universe.

In summary: – an extraordinary object that allows astronomers to study the violent, luminous core of an active galaxy at a distance that is, in cosmic terms, just around the corner. : At its core, the quasar is powered

At its heart lies a supermassive black hole with an estimated mass of (some studies suggest up to 150 million, but the lower range is more common). This black hole is actively accreting gas and dust, forming an accretion disk that outshines the entire host galaxy's stars in some wavelengths.

: Despite its distance, it is one of the most energetic objects in our local universe. Quasars like this can outshine their entire host galaxy, emitting light across the entire electromagnetic spectrum. Why the "Nearest Quasar" Matters It is relatively low-luminosity for a quasar but

What makes Mrk 231 even more fascinating is its "double heart." Data from the NASA Science Hubble Space Telescope suggests the quasar is actually powered by dancing around each other. One black hole is estimated to be 150 million times the mass of our sun, while its smaller companion is about 4 million solar masses. This binary system likely resulted from the merger of two galaxies, a process that fuels the quasar’s intense brilliance. The Brightest Neighbor: 3C 273 Quasar Host Galaxy Markarian 231 - NASA Science