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Sagittarius A*, abbreviated as Sgr A* (/ ˈ s æ dʒ ˈ eɪ s t ɑːr / SADGE-AY-star [3]), is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way.Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, [7] visually close to the Butterfly Cluster (M6) and Lambda Scorpii.
Size comparison of the event horizons of the black holes of TON 618 and Phoenix A.The orbit of Neptune (white oval) is included for comparison. As a quasar, TON 618 is believed to be the active galactic nucleus at the center of a galaxy, the engine of which is a supermassive black hole feeding on intensely hot gas and matter in an accretion disc.
The black hole at the center of the Milky Way; second black hole directly imaged (after Messier 87) Messier 32: 1.5 × 10 6 – 5 × 10 6 [112] A dwarf satellite galaxy of the Andromeda Galaxy. NGC 4395: 3.599 × 10 5 [113] May be the smallest supermassive black hole.
The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy. [1] [2] Its central massive object is a supermassive black hole of about 4 million solar masses, which is called Sagittarius A*, [3] [4] [5] a compact radio source which is almost exactly at the galactic rotational center.
Other examples of quasars with large estimated black hole masses are the hyperluminous quasar APM 08279+5255, with an estimated mass of 1 × 10 10 (10 billion) M ☉, [109] and the quasar SMSS J215728.21-360215.1, with a mass of (3.4 ± 0.6) × 10 10 (34 billion) M ☉, or nearly 10,000 times the mass of the black hole at the Milky Way's ...
The Milky Way [c] is the galaxy that ... an asteroid falling into the black hole or by the entanglement of ... times the size of a full moon) within the Milky Way ...
NASA telescope captures the most detailed glimpse yet of the black hole in the middle of our galaxy. ... The black hole in the center of the Milky Way galaxy is known as Sagittarius A *. It is ...
Such a high mass makes it potentially one of the most massive black holes known in the observable universe. A black hole of this mass has: 24,100 times the mass of the black hole at the center of the Milky Way (Sagittarius A*) Twice the mass of the Triangulum Galaxy, including its dark matter halo. [11]