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Our Galaxy’s Supermassive Black Hole Has Hidden Siblings

    Our Galaxy’s Supermassive Black Hole Has Hidden Siblings By Judith E Braffman-Miller Strange, sinister, and hungry, supermassive black holes lurk in the secretive hearts of perhaps every large galaxy in the visible Universe. Our own Milky Way Galaxy’s resident dark heart is named Sagittarius A (pronounced Sagittarius-a-star), or Sgr A, for short. It is a peaceful, elderly gravitational…

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