Travelling through a black hole like through a wormhole?

To add to my previous question. Can a black hole be a wormhole or can a wormhole exist within a black hole? The result I want to get is this:

• You enter a black hole in one part of space and exit from a white hole in a very different part of space. So you travel through space and time across the universe.

If somebody knows or has any idea of how this could be explained and could work theoretically or better scientifically, please aid me.

Edit: I've noticed in cosmos adventures authors use some kind of vortexes to travel extremely large distances between galaxies. What is this vertex? I couldn't find information about it.

posted over 7 years ago

SovereignSun‭

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