[YeGoblynQueenne]

Thank you, yes, that's what I meant- I dont' know physics (well, very little) so the OP's comment left me confused and I didn't realise there's a technical meaning of "frame of reference". It doesn't help that, in the case of the theory of epicycles and the location of the Earth in space, the technical and colloquial term can mean the same thing.

"I'm not that kind of geek" is a bit of an in-joke so my bad for using it where the context is missing, but I thought it would work even so. The missing context is that a colleague used to tease me for my deplorable lack of a science background, although we did hit it off in terms of our fantasy and science fiction tastes. So, I was not the science kind of geek, although I was the science fiction and fantasy kind of geek.