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May 15, 2024, 4:08 am UTC    
August 18, 2001 02:54AM
<HTML><b>Disclaimer:</b><i> When reading what follows, please be aware that I am not by any stretch of the imagination an expert in the subject of cosmology – what I have is the understanding/knowledge that I have picked up in passing as a fairly average amateur astronomer. Therefore some or all of my interpretation could be flawed and you would be wise to verify it from reputable published sources. This also means that I would welcome correction if I have made erroneous interpretations.</i>

Assuming that you meant the bit about quantized red shifts (if you didn't please let me know which bit you want me to explain a bit more), BB has several implications.

* Space-time came into existence at a specific point in the past. The
universe is therefore neither infinitely large nor infinitely old [1].

* The universe is homogenous on a large scale (at any given time it
appears identical from any point of observation).

* The universe is isotropic (it appears identical in any direction). [2]

The apparent quantization of galactic redshifts [3] (IIRC in quanta of ~72 km/s if one translates z into recessional velocities) can be taken to imply that if an expanding universe is isotropic from our point of observation, then it <i>may</i> not be so from a different point of observation, and thus the principle of homogeneity would collapse. <b>Or</b> it could imply that the universe is not expanding and that what we take to be cosmological red shifts are not in fact cosmological. <b>Or</b> it could imply that the speed of light could be decaying in a quantized manner [4]. <b>Or</b> it could imply that there is some (as yet unknown) mechanism that results in quantization.

Whatever, it is something that I would like to see resolved one way or another.

HTH (or do you wish you'd never asked? [g])


[1] Olbers' paradox is evidence for the non-infinite nature of the universe.

[2] Although it is interesting (to me anyway) with respect to the concept
of space-time is that although the principle of isotropy is meant to hold
for space, it does not do so for time.

[3] It is not yet clear that red-shifts are definitely quantized. The main
proponent of this is U of Arizona astronomer named William Tifft. More
precision is needed in their measurement and more data points are
needed before this can be stated with confidence, although I believe
that the quantization has been confirmed by a study at the University
of Edinburgh. I get the impression (although I may be wrong) that
cosmologists are hoping that with more data and more precision the
'problem' will go away. If not, <i>something</i> is going to need
modification.

[4] A notion that is taken seriously in some respectable quarters. E.g. there is someone (whose name I have forgotten) at Imperial College (U of London) who believes that there is evidence that c was greater immediately after the BB.</HTML>
Subject Author Posted

In the beginning there was ... ?

Don Barone August 16, 2001 07:58PM

Re: In the beginning there was ... ?

Katherine Reece August 16, 2001 08:21PM

Re: In the beginning there was ... ?

Don Barone August 16, 2001 08:46PM

Re: In the beginning there was ... ?

jameske August 16, 2001 10:19PM

Re: In the beginning there was ... ?

D.Przezdziecki August 16, 2001 10:51PM

Re: In the beginning there was ... ?

Stephen Tonkin August 16, 2001 11:05PM

Would you care to explain it a bit more Stephen??(nt)

D.Przezdziecki August 17, 2001 08:55AM

Re: Would you care to explain it a bit more Stephen??(nt)

Stephen Tonkin August 17, 2001 12:49PM

Re: Would you care to explain it a bit more Stephen??(very nt)

Stephen Tonkin August 18, 2001 02:54AM

Re: In the beginning there was ... ?

jameske August 17, 2001 12:48AM

Unless...(deja vu explained)

Adam August 17, 2001 06:14AM

Re: Unless...(deja vu explained)

jameske August 17, 2001 08:23AM

Re: Unless...(deja vu explained)

Anthony August 17, 2001 08:26AM

Re: Unless...(deja vu explained)

D.Przezdziecki August 17, 2001 09:15AM

which coincides..

Anthony August 17, 2001 09:21AM

Re: In the beginning there was ... ?

Katherine Reece August 16, 2001 11:54PM

Re: In the beginning there was ... ?

penny August 16, 2001 11:49PM

Re: In the beginning there was ... ?

KatDawg August 17, 2001 12:05AM

Interesting article

penny August 17, 2001 12:23AM

Re: In the beginning there was ... ?

Mikey Brass August 17, 2001 04:23AM

According to my calculations...

Anthony August 17, 2001 08:01AM

Re: According to my calculations...

jameske August 17, 2001 08:26AM

Re: According to my calculations...

Anthony August 17, 2001 08:58AM

Re: According to my calculations...

jameske August 17, 2001 04:28PM

Re: According to my calculations...

Don Barone August 17, 2001 05:19PM

Re: According to my calculations...

Anthony August 18, 2001 06:54AM



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