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Suekdccia
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- TL;DR Summary
- Receding movement of a stopped object in an acceleraring universe?
Imagine we attach an imaginary cosmological scale rope to an object that is very far away from us. Before attaching the string, the object would be receding from us due to spacetime expansion. After attaching it, tension would form in the string and we would eventually stop the object. After doing that, we let the object be free by cutting the rope. What would happen next? :
If the universe has a decelerating expansion, the object would be completely stopped and then it would begin to be attracted towards us by the force of gravity
If the universe has an accelerating expansion, the object would be completely stopped but then it would begin to move away from us again (provided the object is sufficiently far away that the speed of the expansion of the universe overcomes the force of gravity). So that if we reattach another string to the object and stop the receding movement again, after we cut the new rope,it would start moving away again and so on...
Are these scenarios right?
If the universe has a decelerating expansion, the object would be completely stopped and then it would begin to be attracted towards us by the force of gravity
If the universe has an accelerating expansion, the object would be completely stopped but then it would begin to move away from us again (provided the object is sufficiently far away that the speed of the expansion of the universe overcomes the force of gravity). So that if we reattach another string to the object and stop the receding movement again, after we cut the new rope,it would start moving away again and so on...
Are these scenarios right?