Johnny, You are mixing 2 concepts here. The key is to figure out why the wavelengths are longer. The answer here is (not because the temperature being cooler), but because of the gravitational redshift caused by the greater gravitational force caused by the greater mass density.
When electrons were able to join the nuclei of atoms thus forming atoms instead of ions, radiation was free to move through space. The moment this happened (about 380,000 years after the big bang), the temperature was estimated to be about 3000 K
At 2:50, you explain how radiation with a longer wavelength represented a region of space with a higher matter density because of its increased gravitational attraction. My question is: How does it make classical sense that a region of space with a higher matter density had a cooler temperature? Do blue stars therefore have a low mass density if they emit blue-wavelength light?
At 5:53 you mentioned an earlier galaxy formed around 380million years ago is now 13.7bly away. Shouldn't that galaxy be more far away due to cosmic expansion.
Michael, As you instruct, at the Decoupling CMB radiation could roam undisturbed in every direction. Wouldn't that direction include outwards? Unless something could bounce the radiation back, nothing would prevent that outward movement, and the same process in our "observable" universe would be going on beyond the CMB. The matter (hence gravity) in that portion could be the reason our observable universe in expanding faster.
Yes I did mean beyond the Observable universe. Although beyond CMB is the same thing, and lets call it the "other side." The same process happening in our observable portion is then happening on the "other side" with billions of galaxies, and their gravity the reason our observable universe is accelerating?
I don't think that would be the reason. The current generally accepted theory for the acceleration of the Universe is dark energy. There appears to be a form of energy, currently not yet understood that causes the Universe to expand. (Like a coiled spring will accelerate a mass at the end of the spring).
Michel, The "current generally accepted theory" is wrong. We are told to accept a theory on faith, or take "their" word for it. That would be like religion. Also, we are told we must abandon the laws of physics when it is in conflict with the "current theories." You are correct about the coiled spring analogy. However, the pull of gravity from the matter beyond CMB is pulling our observable universe like a coiled spring from one side. That's why the observable universe is expanding faster closer to CMB. Anyone that can do the calculations of the amount of matter and energy of the universe that has been expanding outwards since Decoupling, its size and speed of expansion (being slowed down by the gravity of our observable universe) and the speed differentiation of it expanding on one side and being swallowed by the CMB from our side can share the Nobel that I should be awarded for my postulation.
At 6:07 you say that stars had to form before galaxies formed. It seems to me that supermassive black holes formed first then lower mass black holes then strange stars then neutron stars then stars. Why is this theory erroneous? It seems to me the density went down as time moved away from the big gang.
simple enough to understand, complicated enough to learn a lot of new knowledge. a very very very good video
Johnny,
You are mixing 2 concepts here.
The key is to figure out why the wavelengths are longer.
The answer here is (not because the temperature being cooler), but because of the gravitational redshift caused by the greater gravitational force caused by the greater mass density.
Sir, I have a question, what is the temperature at Radiation Era?
When electrons were able to join the nuclei of atoms thus forming atoms instead of ions, radiation was free to move through space. The moment this happened (about 380,000 years after the big bang), the temperature was estimated to be about 3000 K
At 2:50, you explain how radiation with a longer wavelength represented a region of space with a higher matter density because of its increased gravitational attraction.
My question is: How does it make classical sense that a region of space with a higher matter density had a cooler temperature? Do blue stars therefore have a low mass density if they emit blue-wavelength light?
At 5:53 you mentioned an earlier galaxy formed around 380million years ago is now 13.7bly away. Shouldn't that galaxy be more far away due to cosmic expansion.
The answer to that question is found in this video: Astronomy - Ch. 27: Quasars (14 of 14) How Far Are Quasars? Reference Table
Michael,
As you instruct, at the Decoupling CMB radiation could roam undisturbed in every direction.
Wouldn't that direction include outwards?
Unless something could bounce the radiation back, nothing would prevent that outward movement, and the same process in our "observable" universe would be going on beyond the CMB.
The matter (hence gravity) in that portion could be the reason our observable universe in expanding faster.
The direction would include outwards. (did you mean to say: "beyond the observable universe"?)
Yes I did mean beyond the Observable universe. Although beyond CMB is the same thing, and lets call it the "other side."
The same process happening in our observable portion is then happening on the "other side" with billions of galaxies, and their gravity the reason our observable universe is accelerating?
I don't think that would be the reason. The current generally accepted theory for the acceleration of the Universe is dark energy. There appears to be a form of energy, currently not yet understood that causes the Universe to expand. (Like a coiled spring will accelerate a mass at the end of the spring).
Michel,
The "current generally accepted theory" is wrong.
We are told to accept a theory on faith, or take "their" word for it. That would be like religion. Also, we are told we must abandon the laws of physics when it is in conflict with the "current theories."
You are correct about the coiled spring analogy. However, the pull of gravity from the matter beyond CMB is pulling our observable universe like a coiled spring from one side. That's why the observable universe is expanding faster closer to CMB.
Anyone that can do the calculations of the amount of matter and energy of the universe that has been expanding outwards since Decoupling, its size and speed of expansion (being slowed down by the gravity of our observable universe) and the speed differentiation of it expanding on one side and being swallowed by the CMB from our side can share the Nobel that I should be awarded for my postulation.
What was there to do in the dark ages?
At 6:07 you say that stars had to form before galaxies formed. It seems to me that supermassive black holes formed first then lower mass black holes then strange stars then neutron stars then stars. Why is this theory erroneous? It seems to me the density went down as time moved away from the big gang.
+ARScooterTow What would have been the mechanism by which neutron stars and black holes would have formed during the early stages of the Universe?
Michel van Biezen its not