The age of the universe

@divegeester

Changed your avatar again I see. Alice in Wonderland this time? 😀

@divegeester said
This is what happens and it would have an impact.

For example if person A was travelling at close to light speed for one month relative to and away from person B who was stationary, and then person A returned at the same speed for another month. Then person A would age hardly at all, while person B would have aged 2 months. This is true for all matter.

Also if a p ...[text shortened]... ough then they would look into the night sky and see nothing at all.

Youtube is a hellava thing.

Yup, YouTube is a belly full.

These are interesting, thought experiments, but I do not believe they have any bearing on either the age of the universe, or on our calculation of the age of the universe. These thought experiments apply not to the passage of time throughout the entire universe, but only to the experience of time for an observer locally, or for some observer relative to some traveler locally . calculations of the age of the universe are based on measurements of the speed at which galaxies are receding, not only from us, but also from each other. Even if some galaxy traveling at near light speed away from us were to reverse course and travel towards us at near lightspeed, these relativistic effects regarding the experience of time would apply only to sentient beings within that galaxy, not to the expansion of the entire universe.

@moonbus said
Yup, YouTube is a belly full.

These are interesting, thought experiments, but I do not believe they have any bearing on either the age of the universe, or on our calculation of the age of the universe. These thought experiments apply not to the passage of time throughout the entire universe, but only to the experience of time for an observer locally, or for some observer ...[text shortened]... would apply only to sentient beings within that galaxy, not to the expansion of the entire universe.

They aren’t “thought experiments” they are scenarios based on the physics of Einstein’s General Relativity.

@moonbus said
@divegeester

Changed your avatar again I see. Alice in Wonderland this time? 😀

No, one of the “evil twins” from The Shinning.

Gravedigger will explain; he’s “Jack Terrence” location “Overlook Hotel”

@divegeester said
No, one of the “evil twins” from The Shinning.

Gravedigger will explain; he’s “Jack Terrence” location “Overlook Hotel”

I have not seen that film. Should I?

@divegeester said
They aren’t “thought experiments” they are scenarios based on the physics of Einstein’s General Relativity.

What's the difference between a thought experiment and a scenario?

@divegeester said
I haven’t made any “assertions”.

My post was in reply to moonbus

@moonbus said
What's the difference between a thought experiment and a scenario?

Mathematics.

@metal-brain said
My post was in reply to moonbus

Ah sorry, saw my name included in the reply and assumed it was to me.

@moonbus said
I have not seen that film. Should I?

I don’t know your taste in films so couldn’t say tbh.

@divegeester said
I don’t know your taste in films so couldn’t say tbh.

It’s Jack Nicholson, isn’t it? I like some of his films, but I have a suspicion he’s not really acting; just being Jack.

@divegeester
Just don't let it happen again🙂

@Metal-Brain
Forbes, a real science journal.....

@sonhouse
https://sudonull.com/post/12974-The-idea-of-a-singularity-before-the-Big-Bang-is-outdated