Questions tagged [big-bang-theory]
Questions regarding the currently prevalent cosmological model for the origin of the universe.
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Cosmic background radiation - what frequency tells us?
I understand that cosmic microwave background radiation is remnant of the universe after 380,000y of the origin.
To me, this radiation is still a wave which has a microwave frequency and I also ...
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why couldn't atoms form in the early big bang?
I'm asking about the time when temperature was super high, but at that time we already had proton, neutron, electrons.
It seems they were moving super fast due to temperature being so high.
What I'm ...
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Could inhomogeneities or topological defects break the fundamental symmetries of the Universe?
I have heard that some types of inhomogeneities and topological defects in cosmology have been proposed to be able to break fundamental symmetries of nature such as the Poincaré, Lorentz, ...
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Why is it Cosmic microwave background not Cosmic gamma ray background [duplicate]
If the universe was at so much heat at the singularity point at big bang , Then the light of CMB must be gamma rays (high energy photons) but how did they transfer into microwaves?
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What is the elemental composition of the universe?
What is the current distribution of elements in the observable universe? Wikipedia lists the composition of the Milky Way, but I'm not sure how the values would change if intergalactic medium were ...
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Redshift distance proportionality at high Z and need for "mighty mouse" galaxies?
Allegedly supported by some evidence from the new James Webb space telescope physicist Eric Lerner has written an article that have garnered some attention. He writes that:
"Put another way, the ...
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What parameters of the Big Bang model will have to be adjusted to account for JWST's observations of highly redshifted galaxies?
There are a lot of claims, on YouTube at least, that the James Webb space telescope have found too many to old/highly redshifted normal looking galaxies to fit easily into the Big Bang model.
One such ...
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Can the JWST track element abundances throughout time? Would this be of any interest at all?
Now that the JWST is peering further and further back into the cosmos, I came to a few questions that I would love to see answered. We know that models of the big bang nucleosynthesis result in ...
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Can we determine our orientation in the universe relative to the origin point of the big bang? [duplicate]
Based on our knowledge of the expansion of the universe, can we trace galaxy movement backwards in order to determine the approximate relative location of the point where the big bang occurred?
The ...
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Does cosmic inflation spawn from empty space, or vice versa?
In the eternal inflation model supported by Sean Carroll and others, the basic premise is that inflation is continuous in places across an infinite cosmos, and that bubble universes (like our own) are ...
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Expansion rate of an infinite universe at the Big Bang
If the universe is infinitely large, then any two arbitrarily distant points must have been arbitrarily close together at some earlier point in time. Doesn't that mean that the expansion rate of the ...
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Does the Cosmic microwave background (CMB) have an amplitude? Does it vary, like the 'temperature' (wavel./freq.) and the polarization?
Somehow, I have never read about this or thought about, until now...
Does the number of photons from the CMB hitting us from all directions vary at all?
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Strange plot in Max Tegmark book, Our Mathematical Universe
In Max Tegmark's book, Our Mathematical Universe, we can find (in chapter 5, figure 5.3) the following (horrible and poor quality) plot that is supposed to highlight the extreme sensitivity of the ...
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How is it possible that a Big Bang happened instead of becoming trapped as a Kugelblitz? [duplicate]
I was reading about Kugelblitz on Wikipedia, and it says that if enough energy gets concentrated it leads to a black hole (from where nothing can escape - supposedly). So, if during the Big-Bang, when ...
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How did cosmic inflation even occur?
I wanted to ask this question that which inflation model shall i believe?
Following below will be MY UNDERSTANDING (MAY NOT BE CORRECT) OF IT:
I read "A Brief History of Time" and in chapter ...
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