Black Holes Uniting: How Do They Crash?

[huhjinsoo]

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??

 

[mfb]

universe has a lot of dimension so

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.

 

[huhjinsoo]

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.

one more..
when they collide they collide with singularity or in the event horizon??

 

[mfb]

The event horizons merge. The singularities probably collide/merge afterwards, too, but that cannot be observed from the outside.

 

[Naty1]

There are some black hole simulations which may be of interest here:

http://en.wikipedia.org/wiki/Black_hole

 

[Naty1]

here, how can this two crash??

gravitational attraction brings black holes together just the same as it brings cosmic dust together to form stars, planets, and black holes themselves...