I’m sure I’m not really understanding gravity theory, but I have in mind the illustration of marbles on a bedsheet. If that bedsheet is space-time, why isn’t there some sort of universal up and down as objects relate to each other?
In: Planetary Science
It is hard to model it in 3 dimensional space. Both as a demonstration as well as in your mind.
What is happening to the bed sheet is happening in ALL directions at the same time. Not just the flat plane you see in the demonstration.
[This should help](https://images.app.goo.gl/sXQUzwgwnvS5st7s8)
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