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A cosmic mystery surrounding a black hole some 270 million light-years from the Milky Way is deepening. Now, the black hole has once again demonstrated strange features that teams of astronomers ...
Below: supermassive black hole devouring a star in galaxy RX J1242−11 – X-ray (left) and optical (right). [98] Unambiguous dynamical evidence for supermassive black holes exists only for a handful of galaxies; [99] these include the Milky Way, the Local Group galaxies M31 and M32, and a few galaxies beyond the Local Group, such as NGC 4395.
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.
The supermassive black hole at the core of Messier 87, here shown by an image by the Event Horizon Telescope, is among the black holes in this list.. This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses (M ☉), approximately 2 × 10 30 kilograms.
A dark, vertical line near the center shows the curve of a dusty disk orbiting the core, suggesting a supermassive black hole inside. / Credit: NASA/STScI, M. A. Malkan, B. Boizelle, A.S. Borlaff ...
Sudden brightness in a distant galaxy has caused astronomers to observe an unprecedented celestial sight: the awakening of a supermassive black hole.
However, such alternatives are typically not stable enough to explain the supermassive black hole candidates. [182] The evidence for the existence of stellar and supermassive black holes implies that in order for black holes not to form, general relativity must fail as a theory of gravity, perhaps due to the onset of quantum mechanical corrections.
The work is described in a new paper, ‘X-ray polarization evidence for a 200 years-old flare of Sgr A*’, published in Nature. Our nearest supermassive black hole ‘became active’ and became ...