The distance between our Solar System and Sagittarius A*, the 4-million-solar-mass black hole at the center of our Milky Way Galaxy, is approximately 25,800 light-years.
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Trolling the Monster in the Heart of the Milky Way - The New York
Mysteriously bright flash is a black hole jet pointing straight
Scientists Discover Earliest Feasting Supermassive Black Hole
How are massive sizes, such as a million suns calculated? What information is needed? - Quora
Milky Way Galaxy's Black Hole Lights up Suddenly and Mysteriously
Chandra Press Room :: Milky Way's Black Hole Shows Signs of
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Bad Astronomy Black holes can rip apart stars, which is easier
Astronomers Uncover Black Hole Closer to Earth Than Ever Before
Earth is closer to our galaxy's black - Hashem Al-Ghaili
Say hello to Sagittarius A*, the black hole at the center of the
Weird dust balls seen impossibly close to our galaxy's huge black hole