I have a doubt about black holes. (I'm sorrying for my poor English.): 1 - Does an observer outside a black hole see forever (i.e. his lifetime) a object stationary when it reaches the event horizon? 2 - Or photons emitted by the object have its wavelength so red-shifted that the observer essentially dont see the object anymore after an amount of time? If (2) is the correct one, then why one say that objects never crosses the event horizon (from our pespective)? They might have crossed it but its photons are undetectable, because its too long wavelength. Obviously, that justification would be made taking no care about the other things we know from the theory. But just because we are not detecting photons from the object is not enough to decide if it has entered the black hole or not. I appreciate any help.