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Re: SpaceTime

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Thomas Heger wrote:
>
> Am Samstag000001, 01.06.2024 um 15:35 schrieb gharnagel:
> >
> > Tom Roberts wrote:
> > >
> > > Spacetime is a MODEL of spatial-temporal relationships observed in
> > > the real world.
> > >
> > > Tom Roberts
> > 
> > I tend to think of physics that way, too, but I was watching this
> > episode of How the Universe Works called "The Mystery of Space Time"
> > and had a few issues with it:
> > 
> > "Space-time is the fabric of our reality"
> > 
> > "The universe is made of space-time"
> > 
> > "Whatever the substance is, time and space bound together, that's
> > expanding
> > and creating the universe we see around us.  It's everything.
> Space-time
> > is what the universe really is."
>
> Well, sounds good!

Since we don't really understand what "space-time" is, we're not nailed
down to a particular mindset.  I believe that the equations of GR are
more
correct than the notion of space-time.

“spacetime is likely to be an approximate description of something
quite
different.” – Steven Carlip

That's not saying GR is absolutely correct, either.

> I had written kind of 'book' about this idea and called it 'structured 
> spacetime'.
>
> This can be found here:
>
> https://docs.google.com/presentation/d/1Ur3_giuk2l439fxUa8QHX4wTDxBEaM6lOlgVUa0cFU4/edit?usp=sharing
>
> The idea behind it is quite simpel:
>
> if GR and QM are somehow valid, there must be a way to bring both 
> systems into a consistent relation.
>
> My own approach was: start at the GR side and with some sort of real 
> existing spacetime.

Or one could start from the QM side.  Might the virtual particle sea be
the basis of space-time?

> The observed world is then the local 'subchapter', which is seen from 
> where we (or any other observer) are placed.
>
> This world has to have fewer dimensions than spacetime.

Aren't dimensions just a human way of looking at reality?  Anyway, I
have a hard time dispensing with them :-)  I would say that our
description
of reality probably needs more than four dimensions.

> Spacetime must also be coordinates free and having no beginning and no
> end.

If you look at the Schwarzschild metric:

ds^2 = (1 - 2GM/rc^2)c^2 dt^2 - dr^2/(1 - 2GM/r) - r^2 dOmega^2

and apply it to the whole universe, rs = 2GM/c^2 is MANY orders of
magnitude
larger than the purported size of the universe.  So the notion that
space-time
is limited to how far the expansion has proceeded is ludicrous.

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Thread

Re: SpaceTime Thomas Heger <ttt_heg@web.de> - 2024-05-30 07:48 +0200
  Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-05-30 13:30 +0200
    Re: SpaceTime Thomas Heger <ttt_heg@web.de> - 2024-05-31 09:17 +0200
  Re: SpaceTime Tom Roberts <tjoberts137@sbcglobal.net> - 2024-05-30 23:25 -0500
    Re: SpaceTime Thomas Heger <ttt_heg@web.de> - 2024-05-31 09:16 +0200
    Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-01 13:35 +0000
      Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-01 09:35 -0700
      Re: SpaceTime Thomas Heger <ttt_heg@web.de> - 2024-06-02 08:01 +0200
        Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-02 08:20 +0200
        Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-02 12:48 +0000
          Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-02 16:47 +0200
            Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-02 16:57 +0000
              Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-02 19:07 +0200
              Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 10:13 -0700
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-02 17:48 +0000
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 11:07 -0700
                Re: SpaceTime Thomas Heger <ttt_heg@web.de> - 2024-06-03 09:00 +0200
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-03 09:57 +0200
                Re: SpaceTime Dmitriy Makricosta <ymt@yyiiciy.gr> - 2024-06-02 20:30 +0000
                Re: SpaceTime Richard Hachel <richard.hachel@invalid.fr> - 2024-06-02 21:34 +0000
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-02 23:22 +0000
                Re: SpaceTime Richard Hachel <richard.hachel@invalid.fr> - 2024-06-03 00:04 +0000
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-03 01:36 +0000
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 19:35 -0700
                Re: SpaceTime Richard Hachel <richard.hachel@invalid.fr> - 2024-06-03 00:17 +0000
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 18:14 -0700
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-03 01:52 +0000
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-03 05:20 +0200
                Re: SpaceTime Hank Bogdán <dnkao@nonkn.hu> - 2024-06-03 19:57 +0000
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 17:31 -0700
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 17:59 -0700
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-03 02:12 +0000
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 19:35 -0700
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 20:06 -0700
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 20:10 -0700
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 20:31 -0700
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 20:55 -0700
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-04 17:13 -0700
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-03 05:23 +0200
                Re: SpaceTime Richard Hachel <richard.hachel@invalid.fr> - 2024-06-04 14:51 +0000
                Re: SpaceTime Python <python@org.invalid> - 2024-06-04 19:26 +0000
                Re: SpaceTime Richard Hachel <richard.hachel@invalid.fr> - 2024-06-04 23:19 +0000
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-05 04:11 +0000
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-05 07:04 +0200
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-05 11:55 +0000
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-05 14:39 +0200
                Re: SpaceTime Richard Hachel <richard.hachel@invalid.fr> - 2024-06-05 10:46 +0000
                Re: SpaceTime Richard Hachel <richard.hachel@invalid.fr> - 2024-06-05 11:00 +0000
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-05 12:05 +0000
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-05 14:40 +0200
                Re: SpaceTime hitlong@yahoo.com (gharnagel) - 2024-06-05 20:20 +0000
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-06 07:28 +0200
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-05 07:02 +0200
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-02 20:17 +0200
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 11:54 -0700
                Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-02 21:01 +0200
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 12:09 -0700
          Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 08:57 -0700
    Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-01 19:48 +0200
      Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-01 12:53 -0700
        Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-01 22:37 +0200
          Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-01 13:46 -0700
            Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-01 17:15 -0700
            Re: SpaceTime Maciej Wozniak <mlwozniak@wp.pl> - 2024-06-02 08:18 +0200
              Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 08:51 -0700
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 09:22 -0700
                Re: SpaceTime Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-06-02 09:28 -0700

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