Tweaked, Xrays show patterns of density, but this is not a physical action of getting from the outside to the inside.
There is no known manner to access the inside of anything from the outside, because you are always on the outside.
I think you are missing the point of this, because there are people who not only believe you can dig or drill your way to the core of the earth but that this is a must do job.
Understand I am talking about physical access, as in going from the outside to the inside through a tunnel, door, hole, window, hatch or key hole. The best you can do is extend the outer dynamics inward, but the internal dynamics remain on the inside.