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How massive is Sagittarius A* compared with the Sun?
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Milky Way Galaxy
The Milky Way Galaxy as seen from Earth.
Sagittarius A*, the supermassive black hole located at the centre of the Milky Way Galaxy, has a mass equivalent to more than 4,000,000 times that of the Sun.123
This mass was determined through observations of the orbital motions of stars near the galactic centre, a discovery for which astronomers Andrea Ghez and Reinhard Genzel were awarded the 2020 Nobel Prize for Physics.123