Take the 2-minute tour ×  My understanding is that light can not
escape from within a black hole (within the event horizon). I've
also heard that information cannot propagate faster than the
speed of light. It would seem to me that the gravitational
attraction caused by a black hole carries information about the
amount of mass within the black hole. So, how does this
information escape? Looking at it from a particle point of view:
do the gravitons (should they exist) travel faster than the
photons?  share|improve this question The no-hair theorem says
black holes are not completely hairless. They have five hairs:
mass-energy $M$, linear momentum $P$ (three components), angular
momentum $J$ (three components), position $X$ (three
components), electric charge $Q$. –  Ali Jul 3 '13 at 16:50 If
you think of gravity as a repelling forces then it makes sense
that gravity doesn't need to "escape" from a black hole. What
fails to escape is the force that repels matter which makes the
gravity seem stronger. –  Derek T