What would happen if two black holes collided?

Answer 1

There are 2 possibilities:

1) One black hole is more massive than the other.
The two black holes would orbit for some time and spiral inward and eventually collide. They will merge around their common center of mass. (This is how Quasars which form the central of galaxies are created)

- If the two black holes are very massive, they will release energy in the form of gravity waves when they orbit each other.

- The resultant black hole will have a mass equal to the sum of the mass of the constituent black holes minus the amount of energy radiated away during the merging. The new black hole will have an event horizon larger than the previous black holes' according to the new black hole's higher mass.

http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/010711a.html
http://www.pnas.org/content/vol98/issue19/images/large/pq2013657002.jpeg
http://www.nytimes.com/2006/05/02/science/space/02hole.html?ex=1304222400&en=117367a3a44fdb24&ei=5088&partner=rssnyt&emc=rss
http://findarticles.com/p/articles/mi_m1272/is_2709_132/ai_n6062574

2) The two black holes are of equal mass.
They'll orbit each other continuously, emittting tremendous amount of energy in the form of gravity waves.

By the way, collisions of black holes are very rare in our galaxy, the Milky Way, at the present time. =)

- Edited to give more evidence and sources.

Answer 2

No need to guess. They collide and give of a lot of energy in form of gravitational waves:

http://www.aip.org/png/2006/256.htm

http://www.nasa.gov/centers/goddard/universe/gwave.html

http://www.nasa.gov/centers/goddard/mpg/146898main_viz_shiftingall_21.320x240.mpg

In the end you have a single black hole which is a lot less massive than the two initial ones were together.

Answer 3

i don't be attentive to approximately merging, however the theory of them orbiting one yet another for a while is extra available on the 2d. The galaxy andromeda somewhat has 2 great massive black holes orbiting one yet another on the middle of the galaxy, indicating andromeda has swallowed yet another galaxy, black hollow and each little thing. Milky way galaxy is subsequent via the way.

Answer 4

it would probaly form into a bigger black hole since the density and gravitational pull are the same regardless of size. The bigger would swollow the smaller and just combine. Thats my theory

Answer 5

The larger one wins and sucks up the other one.

Answer 6

it would turn into one big black hole?

Answer 7

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