Question about black holes

[poiboy]

If gravity is "enabled" (for lack of a better word) through the gravitron, how could black holes have a gravitational influence? Wouldn't the black hole suck the gravitron back in, as it would with the photon? Thanks for any replies.

[meteor]

In theories where gravity is due to exchange of gravitons, these gravitons are virtual particles, are virtual gravitons. Virtual particles can exceed the velocity of light, so can escape from inside the event horizon of a BH. Virtual photons can escape from inside the event horizon as well

[mathman]

Black holes (resulting from something collapsing) never quite make it, as far as an outside observer (o.o.) can tell. This comes about because time at the black hole appears to the o.o. to slow down to a crawl. Another way of looking at it is that the black hole takes forever to form. The gravity (gravitons?) that is exerted is simply that of the object about to become a black hole, but never getting there.

[Arcon]

Originally posted by poiboy
If gravity is "enabled" (for lack of a better word) through the gravitron, how could black holes have a gravitational influence? Wouldn't the black hole suck the gravitron back in, as it would with the photon? Thanks for any replies.

There is a Relativity FAQ on this exact topic. Please see
http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/black_gravity.html