Super-massive black hole spins at 1/2 speed of light – WND.com

  1. Super-massive black hole spins at 1/2 speed of light  WND.com
  2. MIT Scientists Determined The Spin Of A Black Hole Using Annihilated Star  Interesting Engineering
  3. A Black Hole Inhaled a Star. Then It Started to Shrink  Futurism
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