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What we perceive as time is an entropy gradient caused by the expansion of the universe (fedinsfw.app)
submitted 4 months ago by to c/showerthoughts@lemmy.world
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[–] 7 points 4 months ago (1 child)

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?

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  • [–] [S] 0 points 4 months ago (1 child)

    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.

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    • [–] 5 points 4 months ago (2 children)

    So then when the expansion slows and the universe starts contracting (again?), will time then reverse as entropy reverses?

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  • [–] 1 point 4 months ago (1 child)

    Except it doesn't seem like it will ever contract. If universe were to stop or contract, it would collapse into black hole

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  • [–] 1 point 4 months ago (1 child)

    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)

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  • [–] 1 point 4 months ago*

    It's more akin to a white hole. With accelerating expansion It seems everything will escape eventually.

    And then 'accidentally' observable universe is just slightly below Schweidshield radius which would collapse it back into regular black hole. Seems like a very peculiar coincidence.

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    • [–] 3 points 4 months ago*

    Yeah. I give you another thought: Beyond cosmic horizon things are escaping faster then light so it's impossible for information to ever reach us right? WRONG!!! The barier isn't light speed, it's acceleration of the expansion of the universe. Universe with constant expansion rate is (counterintuitively) fully traversable thanks to the ant on the rubber paradox. Ant will always reach its destination as long as space expands at a constant rate.

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    [–] 1 point 4 months ago

    Yeah, but forever takes so long.

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    [–] 1 point 4 months ago (1 child)

    I see time as a description of two or more objects relationship in space.

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