Black Holes: Difference between revisions

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Black holes are strange things. Besides the singularity at the center, there is the event horizon, the point of no return, that once you cross it...[[Department of Redundancy Department|you can't return]]. Once inside the event horizon, you literally cannot go back: spacetime is curved in such a way by the black hole's mass that any path you take leads to the same place: the singularity. Rotating black holes also have ergosphere: a region near event horizon, where space-time spin around black holes faster then light.

In fact, space-time will become quite freaky around the event horizon: the closer you get to the event horizon, the [[Year Inside Hour Outside|slower time becomes]] (due to relativity, however, you won't notice it). In fact, if an observer outside the event horizon could see you, they would see as you get closer and closer (and get redder, due to gravitation red shift, while everything you see would be bluer), you would go slower and slower until you hit the edge of the event horizon at which point you would ''stop'' (nobody would actually see you hit the event horizon, since you appear to slow down as you get closer, for an outside observer, you would take an infinite amount of time to reach it. You wouldn't actually stop, that's just what they'll see). This prediction, however, assumes zero mass of incoming object and neglect quantum effects, so reality may be more tricky.

In fact, space-time will become quite freaky around the event horizon: the closer you get to the event horizon, the [[Year Inside, Hour Outside|slower time becomes]] (due to relativity, however, you won't notice it). In fact, if an observer outside the event horizon could see you, they would see as you get closer and closer (and get redder, due to gravitation red shift, while everything you see would be bluer), you would go slower and slower until you hit the edge of the event horizon at which point you would ''stop'' (nobody would actually see you hit the event horizon, since you appear to slow down as you get closer, for an outside observer, you would take an infinite amount of time to reach it. You wouldn't actually stop, that's just what they'll see). This prediction, however, assumes zero mass of incoming object and neglect quantum effects, so reality may be more tricky.

Of course, nobody knows what'll happen after that, but there still are some theoretical predictions: You'll actually never even notice crossing it. You would just continue accelerating until you hit the singularity and are compacted into it.