Marko Rauhamaa wrote:
We cannot get any information on black holes proper because black holes cannot come into existence according to the very theory that predicts black holes. It will take infinitely long for an event horizon to form.
Only in some frames of reference. By your reasoning, Zeno's paradox proves that a runner can never reach the finish line in a race. But it really only proves that if you measure time in such a way that the finishing time is infinitely far in your future, you will never see him finish. That's obviously a screwy way to measure time in a race, but something similar is happening with the black hole. If you draw coordinate lines in a particular way (corresponding to the inertial frame of an outside observer stationary with respect to the hole) then the time axis bends in such a way that it never crosses the horizon. But there's no reason you have to draw the coordinates that way; there are plenty of others in which the time axis does cross the horizon. -- Greg -- https://mail.python.org/mailman/listinfo/python-list
