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After monitoring stellar orbits around Sagittarius A** (the supermassive black hole in center of the Milky Way) for 16 years, scientists estimate the object's mass at 4.31 million solar masses.

Like ballerinas pirouetting around an invisible leader, a collection of stars orbits our galaxy's gravity sink, or black hole. New infrared images of the cosmic dance confirm that this supermassive black hole weighs as much as 4 million suns.

  1. MSNBC (Image)
  2. ar╬ž