Is “Now”, for me, mathematically the same as “Now” for people on the other side of the world?

Question

I have only a very vague awareness of the idea of relativity but I’m aware that there’s a concept that people in orbit experience less time than those on the planet due to gravity, in some way.

Does this mean that the idea of “now”, as in a moment that is right now, is marginally different for people in other places? Are they experiencing a moment that is in my objective future/past, in a mathematical sense?

In: Physics

Answer 1

Your motion relative to the CMB is probably the most important factor in what “now” is. I base this on my degree in theoretical physics from the university of Youtube.

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Edit: Hat tip PBS Space Time