Scientifically speaking, where would heaven be? (DETAILS )

If heaven, or he’ll were real. Where would they be?

A parallel universe? Somewhere between space and time? Another planet? Maybe in what we call ‘dark matter?’

Has anyone ever heard,or read of any attempts to scientifically define theses places in relation to Earth?

Could we be living in this dimension, and when we die our soul then can travel to the ‘heaven ’ dimension?

As most know, I’m an atheist, but I’m curious that if I’m wrong, where I might end up. Yes , probably Hell, but where would that be in relation to our current location?