What is the evidence and history behind the Big Bang Theory?

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The discussion centers on the Big Bang Theory (BBT) and its supporting evidence, with various links provided for further exploration of topics like Big Bang Nucleosynthesis and the history of the theory. While the original poster expresses skepticism about the BBT, they emphasize the importance of understanding the theory and invite others to share supporting links. The conversation also touches on the concept of the "Big Bounce," which suggests an alternative to the traditional singularity associated with the Big Bang. Participants are encouraged to focus on mainstream cosmology and to discuss the Big Bounce in a separate thread. Overall, the thread aims to clarify the evidence behind the Big Bang while acknowledging emerging theories in cosmology.
Sundance
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Hello All

Reading many posts I find people not understanding the theory behind the Big Bang.

I do not agree with the BBT, but! that does not make me right. I'm not emotionally attached to any theory.

Here are some links in support of the Big Bang, later I will post against. For now maybe discuss the supporting issues.

Tango at your speed.

Big Bang Nucleosynthesis
http://www.astro.ucla.edu/~wright/BBNS.html

A Glimpse of the Young Milky Way
http://www.eso.org/public/outreach/press-rel/pr-2002/pr-19-02.html

Evidence for the Big Bang
http://www.talkorigins.org/faqs/astronomy/bigbang.html#firstlaw

Frequently Asked Questions in Cosmology
http://www.astro.ucla.edu/~wright/cosmology_faq.html#XIN

History of the Big Bang Theory
http://astrophysics.suite101.com/article.cfm/history_of_the_big_bang_theory

Chapter 10 Origin of the Elements
http://www.lbl.gov/abc/wallchart/teachersguide/pdf/Chap10.pdf

Mysterious iron factory in the Early Universe
http://www.mpe-garching.mpg.de/Highlights/pr20020708.html

Phase Transitions in the Early Universe
http://www.damtp.cam.ac.uk/user/gr/public/cs_phase.html

THE BIG BANG:
http://www.umich.edu/~gs265/bigbang.htm

Foundations of Big Bang Cosmology
http://map.gsfc.nasa.gov/m_uni/uni_101bb2.html

If anybody has links that can support the Big Bang, please post them.
 
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Space news on Phys.org
Space-time inflated then matter came later and fell together. And by this then radiated. This way of creating matter with finite density allows the Big Bang to get over its limiting infinite gravity.

Space first then matter then radiation to go Bang!
 
Sundance said:
...

Reading many posts I find people not understanding the theory behind the Big Bang.

...

What do you have about the Big Bounce? Lately I don't hear so much talk about big "bang" and "singularity". Instead i hear about the proposed cosmological bounce.

This proposal goes back in time a little before where the old singularity was supposed to be.

Do you have any links about the Bounce? do you have some explanation or support links?
Please add them to your list!
 

Thread 'Matter density right after the decoupling'

https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
View full post »

Thread 'Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".'

The formal paper is here. The Rutgers University news has published a story about an image being closely examined at their New Brunswick campus. Here is an excerpt: Computer modeling of the gravitational lens by Keeton and Eid showed that the four visible foreground galaxies causing the gravitational bending couldn’t explain the details of the five-image pattern. Only with the addition of a large, invisible mass, in this case, a dark matter halo, could the model match the observations...
View full post »

Thread 'Big Bang and Infinite Universe'

Hi, I’m pretty new to cosmology and I’m trying to get my head around the Big Bang and the potential infinite extent of the universe as a whole. There’s lots of misleading info out there but this forum and a few others have helped me and I just wanted to check I have the right idea. The Big Bang was the creation of space and time. At this instant t=0 space was infinite in size but the scale factor was zero. I’m picturing it (hopefully correctly) like an excel spreadsheet with infinite...
View full post »

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