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Black holes crashing into each other

  1. Apr 9, 2013 #1
    if black hole crash they unite to one b.h
    here, how can this two crash??
    universe has a lot of dimension so
    i think it is hard to
    and when they crash, crash with only singularity??
     
  2. jcsd
  3. Apr 9, 2013 #2

    mfb

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    The universe has 3 spatial and 1 time dimensions, for a total of 4. There might be additional dimensions, but they don't play a role in black hole merging.

    Black holes can merge, if they come very close to each other. They become a single, bigger black hole in this case.
     
  4. Apr 9, 2013 #3
    one more..
    when they collide they collide with singularity or in the event horizon??
     
  5. Apr 9, 2013 #4

    mfb

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    The event horizons merge. The singularities probably collide/merge afterwards, too, but that cannot be observed from the outside.
     
  6. Apr 9, 2013 #5
  7. Apr 9, 2013 #6
    gravitational attraction brings black holes together just the same as it brings cosmic dust together to form stars, planets, and black holes themselves....
     
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