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The universe is expanding faster than expected

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Re: The universe is expanding faster than expected

#51

Post by whatshisface »

layoutIfNeeded wrote: post #44
hypertele-Xii wrote: post #36

Earlier quoted context omitted.

This is because information in your brain is constrained by physics. It takes tangible time for signals to travel between neurons. When you're young, you're small, and the distances are shorter. As you age, you grow in size, and the signal length grows also. Thus as you grow you literally think slower; though hopefully, more effectively (wisdom). Your perception of time changes accordingly.

What you wrote has no basis in reality whatsoever. In fact, nerve conduction is slower in children than adults due to underdeveloped myelination.

Furthermore, "constrained by physics" would imply the speed of light, which is so much faster than nerve conduction...

Re: The universe is expanding faster than expected

#52

Post by Sargos »

hypertele-Xii wrote: post #36
h2odragon wrote: post #34

Time runs slower when you're young; but then as you age there's less time in each day. Perhaps it's the same for everything else that experiences time, from us to galaxies and universes.

This is because information in your brain is constrained by physics. It takes tangible time for signals to travel between neurons. When you're young, you're small, and the distances are shorter. As you age, you grow in size, and the signal length grows also. Thus as you grow you literally think slower; though hopefully, more effectively (wisdom). Your perception of time changes accordingly.

You stop growing physically bigger after around 20 years so this doesn't make any sense.

Re: The universe is expanding faster than expected

#53

Post by shadowofneptune »

layoutIfNeeded wrote: post #44
hypertele-Xii wrote: post #36

Earlier quoted context omitted.

This is because information in your brain is constrained by physics. It takes tangible time for signals to travel between neurons. When you're young, you're small, and the distances are shorter. As you age, you grow in size, and the signal length grows also. Thus as you grow you literally think slower; though hopefully, more effectively (wisdom). Your perception of time changes accordingly.

What you wrote has no basis in reality whatsoever. In fact, nerve conduction is slower in children than adults due to underdeveloped myelination.

From what I remember from development 101, there are also more possible synaptic connections in early childhood, and these get pruned down over time. This would also reduce the amount signals travel.

Re: The universe is expanding faster than expected

#54

Post by nobody9999 »

hypertele-Xii wrote: post #36
h2odragon wrote: post #34

Time runs slower when you're young; but then as you age there's less time in each day. Perhaps it's the same for everything else that experiences time, from us to galaxies and universes.

This is because information in your brain is constrained by physics. It takes tangible time for signals to travel between neurons. When you're young, you're small, and the distances are shorter. As you age, you grow in size, and the signal length grows also. Thus as you grow you literally think slower; though hopefully, more effectively (wisdom). Your perception of time changes accordingly.

I'd say that subjective passage of time is more related to the amount of time you've lived.

When a year is 10% of your total lifetime, it seems a lot longer than when it's 2% of your lifetime.

Re: The universe is expanding faster than expected

#55

Post by barkingcat »

hypertele-Xii wrote: post #36
h2odragon wrote: post #34

Time runs slower when you're young; but then as you age there's less time in each day. Perhaps it's the same for everything else that experiences time, from us to galaxies and universes.

This is because information in your brain is constrained by physics. It takes tangible time for signals to travel between neurons. When you're young, you're small, and the distances are shorter. As you age, you grow in size, and the signal length grows also. Thus as you grow you literally think slower; though hopefully, more effectively (wisdom). Your perception of time changes accordingly.

What if the information in the universe is constrained by yet -unknown physics?

Re: The universe is expanding faster than expected

#56

Post by frongpik »

hypertele-Xii wrote: post #36
h2odragon wrote: post #34

Time runs slower when you're young; but then as you age there's less time in each day. Perhaps it's the same for everything else that experiences time, from us to galaxies and universes.

This is because information in your brain is constrained by physics. It takes tangible time for signals to travel between neurons. When you're young, you're small, and the distances are shorter. As you age, you grow in size, and the signal length grows also. Thus as you grow you literally think slower; though hopefully, more effectively (wisdom). Your perception of time changes accordingly.

That's my perception as well, but iirc, time was slow for me when I was 25. I'd attribute this acceleration to neurons wearing out and thus needing more time to conduct signals, as well as growing apathy when there's less "wow" moments in life and more of "I've seen this before". Adrenaline allows to temporarily restore the proper pace of time.

Re: The universe is expanding faster than expected

#58

Post by doublepg23 »

7373737373 wrote: post #5

Here's a narrated video about this current cosmological crisis: https://www.youtube.com/watch?v=0sfvQ_fsil4 This is one of the key graphics: https://i0.wp.com/particlebites.com/wp-content/uploads/2020/...

This was an excellent video, thank you. PBS Spacetime also did a video: https://youtu.be/72cM_E6bsOs

Re: The universe is expanding faster than expected

#59

Post by amelius »

eloff wrote: post #6
yokem55 wrote: post #4

Earlier quoted context omitted.

Don't worry too much about it. In the end, everything will be nearly 0k.

I appreciate your optimism. I tend to be optimistic about the future myself. But there is no law of the universe that everything will work out ok. Only if we make the right decisions as a species and we don't get unlucky. I'm quite apprehensive that the great filter lies ahead - that technology accelerates too rapidly compared to our wisdom and we end up nearly destroying ourselves. We're getting the ability to progr…

> I appreciate your optimism. I tend to be optimistic about the future myself. But there is no law of the universe that everything will work out ok.

Isn't there some QM law that says that with infinitesimal probability anything can materialize at any point in space? Meaning that after everything has collapsed, you can (will!) still re-materialize somewhere in space. An infinite number of times!

Re: The universe is expanding faster than expected

#60

Post by wruza »

edgefield0 wrote: post #35

A few years ago, a published article suggested an alternative to the universe expanding is increasing mass. Older objects increase their mass and therefore are red shifted. Why is this alternative plausible theory recieving such little attention? Edit: changed mass decay to increase in mass. I misremembered the theory.

But you are the oldest, because every distant object that you see only shows its past. The further, the younger.
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