Tag: milky way

An ‘extragalactic’ intruder may lurk among stars orbiting the Milky Way’s black hole

Astronomers may have discovered an extragalactic intruder among stars that orbit the supermassive black hole at the heart of our Milky Way, Sagittarius A* or Sgr A*.  Sgr A* is surrounded by a cavalcade of stars, the rapid orbits of which have helped astronomers determine that the black hole has a mass around 4.5 million […]

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