Hello friends! Forgive me, I have another question for you physicists. We see those active galactic nucley which show enormous emission phenomena, so: How can we know that responsible are gigantic black holes and not white holes? I suppose we guess it, becouse we have some thoery on the formation of blackholes from a collapsing star while for white holes we have nothing similar, which makes the existence of white holes rather improbable to most people... but we cannot be really sure. Am I wrong?