Interplanetary v. Interdimensional Travel

This will probably be a fairly scientific article. I will go into this topic somewhat in-depth, because meticulous world-building is kind of my thing. Diagrams will be uploaded later, perhaps. If this is too scientific or mathematical I can provide links for brief further reading and/or definitions.

Travel between planets and travel between dimensions don't work the same way. What is the difference?

Firstly, think of interplanetary travel as very long-distance, but still traveling between two coplanar points. On the other hand, traveling between dimensions is traveling between two points that are skew to each other.

TBC