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**engideNedmupe** · 09-10-2009, 10:23 PM

Given that the event horizons are simply arbitary (well, somewhat arbitrary) boundaries in heavily curved spacetime, each black hole will influence the other's spacetime curvature, so the event horizons will become modified accordingly. A bit of net scouring found this simple animation to demonstrate the point:

(Source)

Well, the reason I ask stems back to the "using artificial gravity to escape from within the event horizon" question.

If, theoretically, there is a device which can create (and terminate) a gravity source that is on the scale of a black hole, is it not possible that such a device can be used to alter the boundaries of the event horizon of a black hole such that an object that has already crossed it can be "pulled back" outside again?

09-10-2009, 10:23 PM	#47
engideNedmupe Join Date Oct 2005 Posts 471 Senior Member	Given that the event horizons are simply arbitary (well, somewhat arbitrary) boundaries in heavily curved spacetime, each black hole will influence the other's spacetime curvature, so the event horizons will become modified accordingly. A bit of net scouring found this simple animation to demonstrate the point: (Source) Well, the reason I ask stems back to the "using artificial gravity to escape from within the event horizon" question. If, theoretically, there is a device which can create (and terminate) a gravity source that is on the scale of a black hole, is it not possible that such a device can be used to alter the boundaries of the event horizon of a black hole such that an object that has already crossed it can be "pulled back" outside again?
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