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What, Exactly, Are We Viewing and Imaging?

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#1 Dynan

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Posted 15 April 2024 - 12:29 PM

Is it time for a reboot on the understanding of the universe in which we live and breathe?

 

https://futurism.com...nfront-universe



#2 rob1986

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Posted 15 April 2024 - 01:19 PM

Wont be exactly a reboot...

#3 Bubbagumps

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Posted 15 April 2024 - 01:33 PM

The article is grossly overstating the issues. The expansion rate has been constantly refined over the decades as new information becomes available through observations. 

 

It is always the case that popular science articles become too fixated on expansion as the end-all and be-all of the Big Bang model.  It is only one small piece of the puzzle.

 

Contrary to popular belief, the strongest evidence for the Big Bang scenario does not come from Universal expansion or the theory of dark matter. It comes from everything else we know about the distribution and composition of Baryonic matter on a large scale. You would be hard-pressed to come up with an alternate working theory that could explain these observations.

 

E.G..

 

How do you explain the composition of older Population II/III stars ? The oldest stars observed to exist also are close to the current estimate for the age of the Universe. These stars are composed of roughly 75% Hydrogen, ~25% Helium and only trace amounts of lithium. The only physically plausible scenario to explain this fact is that the helium is the result of nucleosynthesis that had to have occurred as a precursor to the formation of the stars. The only way you could observe this ratio of elements is if the synthesis occurred in some type of cosmic crucible outside of a star. 

 

Then there is the CMB field - Why is it homogenously distributed and within the microwave band ? Where did all those photons come from and why are they all within this specific energy band ? You would be taxed to find a plausible alternate explanation outside of a single homogenous event on a grand universal scale.  

 

One also has to take into account the morphology of the oldest galactic clusters. The farther back we look, the less structured the view. Galaxies become loosely connected blobs in the process of formation. It is pretty clear that an evolution has occurred from some kind of 'square one' starting point that began the process of structure formation on a Universal scale. 

 

Nothing we see makes any sense outside of theorizing a major event that precipitated the formation of the structures we currently observe. The Steady State model won't work. Neither will any known alternate model. Any theory has to be able to explain these observations. So far, there has only been one theory that can account for all these observations and any alternate theory has a lot of explaining to do beyond references to universal expansion. That doesn't mean existing theories won't change in the future as new information becomes available. But you aren't going to convince anyone that the current model is wrong unless you bring your A-game and can explain all this.

 

It's easy enough to try to identify an inconsistency in a model. It's not so easy to provide a viable alternative that actually makes sense in light of observations. So far, the Big Bang model is the only thing that makes any sense of all this. 


Edited by Bubbagumps, 15 April 2024 - 01:49 PM.

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#4 Dynan

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Posted 18 April 2024 - 07:18 AM

Things change as data accumulates:

 

https://www.space.co...-energy-history



#5 imtl

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Posted 18 April 2024 - 03:32 PM

No disrespect but ''top astronomers''?

#6 Cryhavoc38

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Posted 18 April 2024 - 05:25 PM

The speed of light is unbreakable....unless you need to explain how fast matter expanded after the so called Big Bang.



#7 rob1986

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Posted 18 April 2024 - 07:57 PM

We know that there are issues. When enough data prods us in a particular direction, we'll go.

I will admit that I wish we used terms that were more descriptive of tge anamoly though. Such as to discuss quanities of infered dark matter by a init describing the discrepancy between observed matter and expansion, and naming it by some non-missunderstandable term like "zeta"

#8 Redbetter

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Posted 19 April 2024 - 02:47 PM

No disrespect but ''top astronomers''?

There is also a meeting for bottom astronomers, but it is in the basement, and they don't get the cool AV equipment or publicity, and the catering for the mixer is...problematic.

 

Little known fact, like quarks, there are six flavors of astronomer:  up, down, charm, strange, top, and bottom.  Top astronomers get most of the press, although strange get their share as well.  Charm are the rarest/most elusive.  Down astronomers are more common due to weather events, fire smoke, volcanic eruptions, and lack of funding. 

 

Fortunately, astronomers can change flavors.  For example a bit of funding can turn a down astronomer into an up, although losing funding will turn an up to a down.    


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#9 Dynan

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Posted 19 April 2024 - 03:26 PM

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