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Originally Posted by Cougar
...but instead of moving two rocks, consider two raisins in a rising loaf of bread. The appearance and reality is that they are separating, but the raisins are not moving through the bread.
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No, but they are moving
through space.
And our universe is not made up of bread dough with yeast in it. Your analogy doesn’t have anything to do with “space” or the real universe. Your “cosmic muffin” model doesn’t work.
The galaxies aren’t being “carried along” by bread dough.
I used an analogy earlier.... I’m running away from you at 5 mph, so I’m “moving through space” away from you. Then I get into a car and it carries me away from you at 60 mph. I’m being “carried along” by the car, but I’m still "moving away from you" at 60 mph.
The best model of the universe, based on what we can see from inside it, is Lemaitre’s expanding “fireworks” model. If you look at a big “star burst” fireworks display on the 4th of July, you will see and expanding sphere of bright dots, all moving outward from a “point”. The ones that are most distant from the point are moving the fastest. The ones that are closest to the point are the slowest. The original point doesn’t move.