Expanding Universe: Cosmologists Observations & Questions

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SUMMARY

The forum discussion centers on the complexities of the Big Bang Theory and the observed accelerated expansion of the universe. Participants debate the validity of classical physics laws, specifically Newton's law of gravitation and F=MA, which have been superseded by Einstein's General Relativity. The conversation highlights the role of dark energy as a theoretical construct to explain the universe's expansion, while questioning the evidence supporting its existence. The discussion concludes that understanding current cosmological consensus is essential for meaningful debate on these topics.

PREREQUISITES
  • General Relativity (Einstein's 1915 gravity law)
  • Big Bang Theory fundamentals
  • Understanding of dark energy and its implications
  • Basic principles of cosmology and observational evidence
NEXT STEPS
  • Research the implications of General Relativity on cosmological models
  • Explore the evidence for dark energy, including the Perlmutter supernova study
  • Study the concept of cosmic homogeneity and its relevance to the Big Bang Theory
  • Investigate alternative theories to dark energy and their scientific reception
USEFUL FOR

Cosmologists, astrophysicists, and students of physics seeking to deepen their understanding of the universe's expansion and the foundational theories that explain it.

  • #31
Alright, can someone please give me a simple lists of steps in what happened in the Big Bang. You guess obviously know the theory front to back, could you please just give me a general overview. Honestly, I'm 16 years old, number one in my class, number one on the golf team, Vice President of NHS, and Vice President of the class. I have a lot of work to do every day when I get home from school, and really don't have the time to look through the links you guys have given me. The only reason I looked into this Big Bang stuff at all is because I did a physics project on it entitled "The physics of creation". Please...
 
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  • #32
If you've got the time to come here and argue about it, you've got the time to read information from the links posted so far.
 
  • #33
ChristianGolfer said:
... Honestly, I'm 16 years old, ...

It all becomes clear now :smile:
 
  • #34
How is it quicker to read something here than elsewhere? The information you've been pointed towards is more complete and carefully constructed than a quick post from someone here would provide. Given the responses you have given to the explanations we have already taken the time to give, it dosn't encourage spending a more lengthy amount of time explaining things to a greater depth.

If you want to understand things more deeply you will have to invest some time and effort in it. There is no way to short cut this fact that anyone else here can provide.

We are happy to answer questions, but when the answers are ignored and the same questions are fired back again patience runs thin.
 
  • #35
A bright, but cocky, 16 year old, probably with a strong religious upbringing, what to recommend...

One place to start reading might be:

http://map.gsfc.nasa.gov/m_uni.html
http://map.gsfc.nasa.gov/m_uni/uni_101bb1.html
http://map.gsfc.nasa.gov/m_uni/uni_101bb2.html
http://map.gsfc.nasa.gov/m_uni/uni_101bbtest.html

I'm giving multiple links rather than 1 because the site navigation is a bit funky.

And you might find it interesting that LeMaitre, often called the "Father of the Big Bang", was a Jesuit monsignor. So if you are experiencing some personal religious issues (not that it's really any of our business), you might find it interesting that the father of the Big Bang was a Jesuit.

Note that different people here know different things and are at different educational levels. I, for instance, am more interested in General Relativity than cosmology, but I've been dragooned to this forum to help keep an eye on it while our moderator, Space Tiger, works on his thesis.

As you get older than 16, you may one day start to appreciate that not everything can be explained in 200 words or less. Furthermore, you may someday be in the position of trying to explain to your 16 year old son that a) you don't know everything b) you do know things that he doesn't (not that he'll believe you) and that c) communicating across the generation gap can be difficult.
 

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