From: PointedEars@web.de
Kualinar wrote:
> Le 2025-08-29 à 01:57, Whisper a écrit :
>> On 29/08/2025 5:12 am, casagiannoni@optonline.net wrote:
>>> Wasn't created. Always was and always will be.
>>>
>>> Infinite in space and time, with no bounds or limits.
>>>
>>> Includes everything, so there can be only one.
>>>
>>> No God.
>>
>> Correct. Now cue all the usual fairytale nonsense eg big bang, multi
>> verses, black holes, alien visitors, human colonization of other planets
>> blah blah
>
> Big Bang : Really started.
Correctly worded, because the Big Bang is the *ongoing* expansion of our
universe.
> The singularity may have been there for ever
There was no literal physical singularity. That is merely a mathematical
artifact of general relativity, namely when you assume that a(t = 0) = 0.
[Then the Kretschmann scalar of the FLRW metric becomes singular, so there
is no coordinate transformation to avoid that.] But there is no good
physical reason to do that.
> Whatever was before T0 is outside of our reach as any information about
> that time have been irrevocably scrambled.
You mean t = 0, where t is cosmological time. However, currently we cannot
even know what could have been before t =~ 10^-43 s, and we cannot observe
what has been before t =~ 378'000 a when the CMB was produced (although
gravitational-wave astronomy could help there).
> Black holes : VERY real. Observed. Or, rather the effect they have on
> their surrounding, their collisions.
Black holes have been observed directly since 2019:
> Human colonization of other planets : Probably NOT within out live
> times,
_lifetimes_
> but maybe in a few centuries. Still the stuff of science fiction,
> but, for how long ?
ACK.
--
PointedEars
Twitter: @PointedEars2
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