How exactly did Superman Die and Come Back Alive?

ok so from some places i hear and read or whatever that superman was fighting doomsday and that he died from exhaustion and then another one says that he gets vaporized or something by somebody and for how he comes back was that one says he saw uncle ben which im guessing is from spiderman and another one says he... show more ok so from some places i hear and read or whatever that superman was fighting doomsday and that he died from exhaustion and then another one says that he gets vaporized or something by somebody and for how he comes back was that one says he saw uncle ben which im guessing is from spiderman and another one says he sees his biological dad and they both say he has more to live up to or whatever and his time is not now and then he gets back alive but another one says that he goes to the future and meets some immortal guy who brings him back and then i'm told that there's 4 new superman who are trying to take his place?
please explain 10 pts bes answer please and thank you
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