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Re: The Shape of the Universe.

From Daniel60 <daniel47@eternal-september.org>
Newsgroups rec.arts.sf.written, sci.physics, sci.physics.relativity, alt.astronomy
Subject Re: The Shape of the Universe.
Date 2018-04-25 20:25 +1000
Organization A noiseless patient Spider
Message-ID <pbpl4f$q12$1@dont-email.me> (permalink)
References <5AD6E787.5457@ix.netcom.com> <FrmdnXfc5LiqYUDHnZ2dnUU7_8zNnZ2d@giganews.com> <pbn23h$moh$1@dont-email.me> <5NqdnctRoo6rn33HnZ2dnUU7_83NnZ2d@giganews.com>

Cross-posted to 4 groups.

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Tom Roberts wrote on 25/04/18 14:21:
> On 4/24/18 5:48 AM, Daniel60 wrote:
>> Tom Roberts wrote on 24/04/18 01:31:
>>> In our current best cosmological models, spaceTIME is curved, but 
>>> space is flat.
>>
>> How can space possibly be "flat"??
> 
> Here "flat" is a technical term meaning that the Riemann curvature 
> tensor is identically zero.
> 
>> Seems to me, here on Earth, I can go North-South, and I can go 
>> East-West and I can go Up-Down ... three dimensions!!
> 
> Sure.
> 
>> [...] three dimensions!
> 
> My use of "flat" does not imply 2 dimensions, as you seem to think. 
> Indeed it can apply to manifolds of any dimension greater than 1.
> 
> Tom Roberts

Well, why didn't you say so?? ;-P

-- 
Daniel

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Thread

The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-17 23:36 -0700
  Re: The Shape of the Universe. "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-04-18 00:12 -0700
    Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-18 00:42 -0700
      Re: The Shape of the Universe. Daniel60 <daniel47@eternal-september.org> - 2018-04-18 22:26 +1000
        Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-18 17:02 -0700
  Re: The Shape of the Universe. SolomonW <SolomonW@citi.com> - 2018-04-18 17:33 +1000
    Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-18 10:27 -0700
      Re: The Shape of the Universe. SolomonW <SolomonW@citi.com> - 2018-04-19 12:19 +1000
        Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-19 23:51 -0700
          Re: The Shape of the Universe. SolomonW <SolomonW@citi.com> - 2018-04-21 22:02 +1000
            Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-21 09:25 -0700
              Re: The Shape of the Universe. SolomonW <SolomonW@citi.com> - 2018-04-22 16:23 +1000
                Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-22 13:48 -0700
                Re: The Shape of the Universe. SolomonW <SoloomonW@citi.com.au> - 2018-04-23 10:35 +1000
                Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-22 21:13 -0700
                Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-22 23:23 -0700
                Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-22 23:31 -0700
                Re: The Shape of the Universe. SolomonW <SolomonW@citi.com> - 2018-04-23 20:04 +1000
  Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-18 10:18 -0700
  Re: The Shape of the Universe. benj <benj@nobody.net> - 2018-04-18 13:33 -0400
    Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-19 23:53 -0700
  Re: The Shape of the Universe. casagiannoni@optonline.net - 2018-04-20 07:38 -0400
    Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-20 10:07 -0700
  Re: The Shape of the Universe. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-23 10:31 -0500
    Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-23 22:50 -0700
    Re: The Shape of the Universe. Daniel60 <daniel47@eternal-september.org> - 2018-04-24 20:48 +1000
      Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-24 08:49 -0700
      Re: The Shape of the Universe. The Starmaker <starmaker@ix.netcom.com> - 2018-04-24 08:50 -0700
      Re: The Shape of the Universe. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-24 23:21 -0500
        Re: The Shape of the Universe. Daniel60 <daniel47@eternal-september.org> - 2018-04-25 20:25 +1000
      Re: The Shape of the Universe. Klaus Meinhard <k_meinhard@gmx.de> - 2018-04-25 08:53 +0200
        Re: The Shape of the Universe. Daniel60 <daniel47@eternal-september.org> - 2018-04-25 20:28 +1000
        Re: The Shape of the Universe. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-25 10:42 -0500
          Re: The Shape of the Universe. "hanson" <hanson@quick.net> - 2018-04-25 13:33 -0700
            Re: The Shape of the Universe. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-25 22:53 -0500
              Re: The Shape of the Universe. "hanson" <hanson@quick.net> - 2018-04-26 00:00 -0700
              Re: The Shape of the Universe. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-29 03:06 +0200
            Re: The Shape of the Universe. Daniel60 <daniel47@eternal-september.org> - 2018-04-26 19:44 +1000
              Re: The Shape of the Universe. "hanson" <hanson@quick.net> - 2018-04-26 08:18 -0700
                Re: The Shape of the Universe. Daniel60 <daniel47@eternal-september.org> - 2018-04-28 00:16 +1000
                Re: The Shape of the Universe. "hanson" <hanson@quick.net> - 2018-04-27 07:46 -0700
            Re: The Shape of the Universe. Lofty Goat <rlwatkins@gmail.com> - 2018-04-28 12:33 -0500
              Re: The Shape of the Universe. benj <benj@nobody.net> - 2018-04-28 14:34 -0400
                Re: The Shape of the Universe. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-28 22:33 -0500
                Re: The Shape of the Universe. benj <benj@nobody.net> - 2018-04-29 03:17 -0400
                Re: The Shape of the Universe. "Sea Wasp (Ryk E. Spoor)" <seawasp@sgeinc.invalid.com> - 2018-04-29 09:21 -0400
                Re: The Shape of the Universe. "hanson" <hanson@quick.net> - 2018-04-29 07:26 -0700
              Re: The Shape of the Universe. "hanson" <hanson@quick.net> - 2018-04-28 11:44 -0700
          Re: The Shape of the Universe. Klaus Meinhard <k_meinhard@gmx.de> - 2018-04-27 09:47 +0200
            Re: The Shape of the Universe. Helmut Wabnig <hwabnig@.- --- -.dotat> - 2018-04-27 21:39 +0200
        Re: The Shape of the Universe. "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-04-25 15:33 -0700

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