I would like to know, what would happen if two black are near?

Question

Is it possible that, obviously if their gravitational field is sufficient enough to reach the other black hole, those two black holes will suck up each other ?

And if they do, will they exist (both of them)?

Answer 1

It is perfectly possible and no doubt happens.

Answer 2

They would combine and create a black hole with properties (mass, spin and electrical charge) equal to the mathematical sum of the two black holes.

Basically, this means that you would just add all the properties of each black hole together to get the properties of the newly created black hole.

It is also hypothesized, but unproven, that two black holes combining would create measurable gravity waves. If this was detected and validated, we could then determine if there is truly a "speed of gravity", or if the effects of gravity travel infinitely fast (faster than light). We currently have no evidence either way. If it was proven that the effects of gravity travel faster than light, then we could use gravity waves to transmit information faster than the speed of light, and this would substantially change some of our most basic understandings of how the Universe operates.

Answer 3

A black hole is always in the center of a Galaxy. It furnishes the gravity for the hold galaxy together . At present there are 2 Galaxy's colliding...

Answer 4

Black holes do no "suck" stuff in, no more than any other mass.  They have the gravitational field of any other object of the same mass.

One major difference is that black holes are small, so that the gravity gradient (the "slope" of the field intensity, to talk in math terms) gets a lot steeper than for "normal" objects.

You don't get that in a normal object because the surface of the object gets in the way before you get "deep" enough into the gravitational well.

When there is a gradient, the front end of any object falling in gets a greater attraction than the back end of the object.  This creates a tension in the object.  When the gradient becomes steep enough, the tension will rip the object apart.

In a black hole, the gradient can get steep enough so that even atoms can be ripped apart.

Back to our two black hole:  Yes, it is possible that two black holes get together.  In the vastness of space, a black hole is very small.  The chances that they will actually collide is extremely small.  They will probably enter into an orbit around each other.

According to Relativity (if the gravitational information really is limited by the speed of light), the encounter should produce gravitational waves.  This takes energy that must come from the orbital energy.

The orbit would get smaller and smaller.  Smaller orbit = higher orbital speed and faster orbital period = more energy lost to gravitational waves.

Eventually, the two black holes will merge, forming only one (rapidly rotating) black hole.  Mathematically, this new singularity would be represented by a circle (not by a point).  We do not know what things actually look like inside a black hole (and we're not even sure if the concept of "looks like" can really apply inside the event horizon).

The mass of the new black hole will be the sum of the two original black holes (minus whatever energy was lost in creating the gravitational waves).  The new event horizon will have a radius equal to the sum of the two original radii.

You end up with only 1 black hole, not two.

This is all the result of applying theories, since we have not yet observed the merging of black holes nor have we detected any gravitational waves yet.