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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.
Sagittarius A (Sgr A) is a complex radio source at the center of the Milky Way, which contains a supermassive black hole. It is located between Scorpius and Sagittarius , and is hidden from view at optical wavelengths by large clouds of cosmic dust in the spiral arms of the Milky Way.
A small mass has an extremely small Schwarzschild radius. A black hole of mass similar to that of Mount Everest [ 19 ] [ note 2 ] would have a Schwarzschild radius much smaller than a nanometre . [ note 3 ] Its average density at that size would be so high that no known mechanism could form such extremely compact objects.
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Estimates from an IAU question-and-answer press release from 2006, giving 800 km radius and 0.5 × 10 21 kg mass as cut-offs that normally would be enough for hydrostatic equilibrium, while stating that observation would be needed to determine the status of borderline cases. [50]
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Sagittarius season began on Nov. 21 and will end on Dec. 21, 2024. ... She adds that the specific day can vary based on the Earth's axis and orbit in a particular year.
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