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There are (according to theory) many black holes in space with varying masses. Some can even be as small as a pound !...There is no limit on how small or large a black hole can be. Each mass has an event horizon, (Schwarzshield radius) if squezed smaller than that, it would become a black hole. In the case of stars this is about 2.5 times the size of the Sun. So black holes are usually formed by collapsing stars whose mass is several times the mass of the Sun. If a large Black hole has another smaller Black hole in the vicinity it will attract it with it's gravity and eventually merge with it. If it is rotating (which is most likely) it is also dragging all matter in the vicinity including other Black Holes. This causes X-Ray radiation coming from the Black hole and thus make it detectable. So orbit or no orbit Black holes are just strange creatures. May be they are a gateway to heaven or hell !

2007-03-07 14:55:29 · answer #1 · answered by h8gwb 3 · 0 0

I don't know where dafadfafsd f's got his information from, but the Schwarzschild radius is the radius at which a mass will collapse into a blackhole or singularity.

As a matter-of-fact, if a blackhole has a companion star, they will both rotate around a common center of gravity.

And in fact all mass has an effect on other objects. The effect is so minute for distant objects, but nonetheless, the effects of gravity can be calculated. Just a little trivia - there is less gravity on your head then on your feet when you are standing. This would be noticeable as you pass over the event horizon and would become more noticeable as you approached the singularity (assuming you would live and be able to observe this phenomenon).

2007-03-07 16:38:57 · answer #2 · answered by Scarp 3 · 0 0

Yes, and they do.

(Check out the site below, for a bunch of small black holes in orbit around the central black hole of our own Galaxy).

However, because of their mass and density, it is thought that black hoes that orbit each other will emit gravitational waves (they have never been observed but theory predicts them). If that is true, then energy is needed to produce these waves and the energy cannot come from the inside of the black holes; therefore, it must come from the kinetic energy (in other words, the orbits must slowly get smaller and smaller as energy is carried away by the gravitational waves). Orbiting black holes are bound to spiral into each other -- however, it may take a very long time...

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The emission of gravitational waves is true for any object orbiting each other (including Earth and Sun). However, for common objects like that, the waves are so small that the effect cannot be measured nor observed. Other effects will affect our orbits a lot more than the very weak gravitational waves.

2007-03-07 15:09:07 · answer #3 · answered by Raymond 7 · 0 0

If a black hole could exist it would act like any other celestial body.
It would be subject to the rules that governs the orbits of any satellite system.
Black holes are elegant and logical theoretical entities that cannot survive a rigorous,objective analysis.

2007-03-08 03:24:20 · answer #4 · answered by Billy Butthead 7 · 0 0

Only relative to the supermassive gravastar thought to be in the centre of our (and many other) galaxies. Except very rarely, they are too far away from each other to have any appreciable effect, but when galaxies collide, many unusual phenomena may occur, such as 2 gravastars orbiting each other, or even colliding. I'd give a lot to see that! (from a safe distance, of course).

2007-03-07 14:41:36 · answer #5 · answered by CLICKHEREx 5 · 0 0

Well if you mean could black holes orbit something or have something else orbit them just like any regular planet or star, then yes.

2007-03-07 14:24:25 · answer #6 · answered by campbelp2002 7 · 0 0

black hole is real. be afraid. your friend, mikey. but u don't have to worry about it for a little while.

2007-03-07 14:25:34 · answer #7 · answered by ? 4 · 0 2

I do not understand your question

2007-03-07 14:20:57 · answer #8 · answered by theartisttwin 5 · 0 0

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