Hello! Can anyone help me with the following question about black holes? Let us consider a massive star which at the end of its evolution collapses into a black hole (say a Schwarzschild black hole, for the sake of simplicity). An observer far away, in its coordinate time, will never see the collapse because it would take an infinite amount of time for the star to reach its event horizon. On the other hand, the black hole forms because the amount of proper time would instead be finite. Since we are able to detect black holes (from indirect observations), should we infer that they are eternal? And if they are eternal, how does this possibly match with Hawking radiation (their mass should be infinite and they cannot evaporate)? Is it possible that what we see are still forming black holes? Thank you very much!