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Re: Deep Thought

Cross-posted to 4 groups.

Followups directed to: sci.physics.relativity

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[Please do not crosspost without Followup-To.  F’up2 sci.physics.relativity]

Chris M. Thomasson wrote:
> <sci-fi>

Yes, it is, for the most part.  And it appears to have little to do with my
posting.

> I have always had a little feeling that the big bang might be nothing 
> more than a local hyper massive explosion contained within a much larger 
> universe.

A common misconception.

Contrary to what the term implies, the Big Bang is NOT an explosion.  Keep
in mind that the term was coined by Fred Hoyle in order to *mock* adherents
of the now-confirmed theory of universal *expansion*.  The name stuck,
therefore we call it the Big Bang theory today.

The Big Bang as an event was not local in any sense of the word, but as an
event was and as a process is global in every sense of the word: It
happened/happens everywhere in our universe.  Regarding the event, because
our universe was infinitesimally small back then; regarding now, because
that is what our universe is.  The theory says that spacetime began with
the Big Bang event:

,-<https://en.wikipedia.org/wiki/Big_Bang#Expansion_of_space>
|
| […] The Big Bang is not an explosion of matter moving outward to fill an
| empty universe. Instead, space itself expands with time everywhere […]

> Perhaps a cluster of ultra massive black holes all finally 
> merged together.

An interesting idea that might be difficult to disprove (which does not mean
that it is correct).  IIUC it is a distinct possibility – and not
science-fiction – that what we think is our universe is actually the inside
of a supermassive black hole (see also:
<https://en.wikipedia.org/wiki/Holographic_principle>).

Dr. Lawrence Krauss answered to the question

,-<https://youtu.be/7ImvlS8PLIo?t=3453>
|
| Q: […] If quantum fluctuations are able to actually produce universes […],
| is there ever a chance we might actually observe another universe being
| created?

after his (great) 2009 talk “A Universe from Nothing”:

| A: […] But interestingly enough – and this is one of the wonderful things
| about general relativity ­– if a baby universe got created, an inflating
| universe like the one we think we began in, it’s really weird: Because
| from the inside it would look like it was growing exponentially; from
| the outside it would look like it was shrinking to form a black hole.

This answer has puzzled me since I have heard it, and I would appreciate
an explanation in simple terms (I have not yet a full understanding of
general relativity) by a professional physicist.

> Wrt a larger universe, the big bang could be a single 
> pixel in the following rendering:

Not the Big Bang, but our observable universe.  The “larger universe” would
be the multiverse.

IIUC, this is the theory of eternal inflation.  However, it appears to have
been disproved by the “Planck” space probe’s 2015 data release.  The final
dataset of the mission was just released, which might indicate something
else; I have not had time to look at (analyses of) it.

<https://en.wikipedia.org/wiki/Eternal_inflation>

-- 
PointedEars

Twitter: @PointedEars2
Please do not cc me. / Bitte keine Kopien per E-Mail.

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Thread

Deep Thought The Starmaker <starmaker@ix.netcom.com> - 2018-07-22 14:26 -0700
  Re: Deep Thought Thomas Heger <ttt_heg@web.de> - 2018-07-23 16:43 +0200
    Re: Deep Thought Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-07-23 18:08 +0200
      Re: Deep Thought "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-07-23 21:45 -0700
        Re: Deep Thought Thomas Heger <ttt_heg@web.de> - 2018-07-24 11:42 +0200
          Re: Deep Thought The Starmaker <starmaker@ix.netcom.com> - 2018-07-24 11:21 -0700
          Re: Deep Thought "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-07-24 16:52 -0700
            Re: Deep Thought Thomas Heger <ttt_heg@web.de> - 2018-07-25 22:31 +0200
              Re: Deep Thought The Starmaker <starmaker@ix.netcom.com> - 2018-07-25 23:36 -0700
                Re: Deep Thought benj <benj.fake@gmail.com> - 2018-07-26 10:00 -0400
                Re: Deep Thought The Starmaker <starmaker@ix.netcom.com> - 2018-07-26 11:23 -0700
                Re: Deep Thought benj <benj.fake@gmail.com> - 2018-07-26 19:45 -0400
              Re: Deep Thought "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-07-25 23:56 -0700
                Re: Deep Thought "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-07-26 00:00 -0700
                Re: Deep Thought Daniel60 <daniel47@eternal-september.org> - 2018-07-27 17:01 +1000
                Re: Deep Thought The Starmaker <starmaker@ix.netcom.com> - 2018-07-27 10:38 -0700
                Re: Deep Thought The Starmaker <starmaker@ix.netcom.com> - 2018-07-28 10:38 -0700
                Re: Deep Thought "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-07-27 14:29 -0700
                Re: Deep Thought Thomas Heger <ttt_heg@web.de> - 2018-07-28 12:00 +0200
                Re: Deep Thought Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-07-28 14:44 +0200
                Entropy converts black holes into SpaceTime. Jeff-Relf.Me  @. - 2018-08-12 15:59 -0700
                Re: Entropy converts black holes into SpaceTime. "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-08-12 16:15 -0700
                Entropy converts black holes into SpaceTime. Jeff-Relf.Me  @. - 2018-08-12 16:30 -0700
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-13 21:20 -0700
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-13 23:42 -0700
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-14 00:36 -0700
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-28 00:21 -0700
                Re: Entropy converts black holes into SpaceTime. "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-08-28 00:56 -0700
                Re: Entropy converts black holes into SpaceTime. Daniel60 <daniel47@eternal-september.org> - 2018-08-28 19:23 +1000
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-29 00:01 -0700
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-28 23:58 -0700
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-29 11:09 -0700
                Re: Entropy converts black holes into SpaceTime. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-29 20:24 +0200
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-29 13:39 -0700
                Re: Entropy converts black holes into SpaceTime. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-30 03:43 +0200
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-29 20:43 -0700
                Re: Entropy converts black holes into SpaceTime. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-31 00:52 +0200
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-31 09:48 -0700
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-08-31 22:46 -0700
                Re: Entropy converts black holes into SpaceTime. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-01 13:50 +0200
                Re: Entropy converts black holes into SpaceTime. The Starmaker <starmaker@ix.netcom.com> - 2018-09-01 09:37 -0700
                Re: Entropy converts black holes into SpaceTime. "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-08-29 18:09 -0700
                Re: Entropy converts black holes into SpaceTime. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-30 04:36 +0200
        Re: Deep Thought Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-07-24 21:19 +0200
          Re: Deep Thought The Starmaker <starmaker@ix.netcom.com> - 2018-07-24 13:04 -0700
            Re: Deep Thought Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-07-25 03:36 +0200
              Re: Deep Thought The Starmaker <starmaker@ix.netcom.com> - 2018-07-24 22:44 -0700
  Re: Deep Thought benj <benj.fake@gmail.com> - 2018-07-23 11:05 -0400
  Re: Deep Thought "C. Deifir" <cdf@dfr.net.inv> - 2018-07-23 21:18 +0100

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