loving the discussion here, although all the maths is way over my head, I am slowly researching to help my understanding of what you guys are saying.
however it would be of great help if someone could refer to my 3 questions in the OP, as no one has answered or discussed the motion in those...
I'm here to discuss motion in spacetime and how it works to hopefully get a better understanding of it.
Specifically "spacetime swimming", and the motion of a "relativistic glider", which is talked about in this article "Surprises from General Relativity: "Swimming" in Spacetime" By Eduardo...