So then when the expansion slows and the universe starts contracting (again?), will time then reverse as entropy reverses?
I’m pretty sure nobody thinks the Big Crunch is going to happen anymore, considering the expansion of the universe is accelerating.
I sorta think its still possible. Im not 100% sold gravity is a constant on massive scales.
Except it doesn’t seem like it will ever contract. If universe were to stop or contract, it would collapse into black hole
The moment before the big bang, the universe was a singularity similar to a black hole though. In fact, our universe shares several properties with black holes (mass/energy can never escape it, for example)
The entropy gradient and cosmic inflation were both ultimately caused by the big bang, sure… but in what sense is the expansion directly causing the entropy gradient?
Also, cosmic inflation isn’t evenly distributed—it mostly happens in intergalactic space. Are you saying that time is progressing more rapidly in regions where space is expanding more quickly?
By going from a state of higher density of energy/matter to a state of lesser density, it’s a gradient much like an electrical field.
We know that time progresses at different rates due to gravitational effects, it follows that time would progress differently in more/less dense parts of the universe.
I see time as a description of two or more objects relationship in space.
I view time as a relative dimension in space.
