All Questions
Tagged with dark-energy big-bang
20
questions
4
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If the observable universe had only one galaxy, how would people know the expansion of the universe?
Hubble measured high redshifted galaxies to discover the cosmic expansion. In a hypothetical universe where only one galaxy exists, would there still be observational evidence for the Big Bang theory? ...
- 195
-4
votes
2
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143
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Suppose the universe from our big bang is surrounded by many distant blackholes with each a mass of sextillions of suns. Could it explain dark energy?
Could dark energy "simply" be from multiple distant universe-scale mass black holes, that are there "all-around" the big bang?
Scattered apparently randomly, throughout infinity (...
- 101
1
vote
0
answers
65
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Dark energy/dark matter erodes confidence in origin theories [closed]
My layman's understanding is that we believe we have a good understanding of the development of the universe after the instant of the Big Bang.
Also, I understand that we believe that about 95% of the ...
- 21
1
vote
2
answers
194
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Can dark energy dominate from the Big-Bang?
I'm studying the age of the universe for a universe dark energy dominated. Using Friedmann equation
$$
\left( \frac{\dot{a}}{a} \right)^2 = H_0^2 \left[ \Omega_R \cdot a^{-4} + \Omega_{NR} \cdot a^{-3}...
- 317
9
votes
4
answers
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Why was more dark energy created during the creation of the Universe than normal energy?
I would like to know if there is an agreed upon explanation within the field of physics as to why more dark energy than normal energy was created during the creation of the Universe.
More is unknown ...
- 478
10
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4
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So Universe Expansion is accelerating, it already did with the Big Bang, so what came in-between?
So scientists are finding that the Universe is expanding at an accelerating rate.
It is said 'Dark Energy' is the cause. Ok.
But the Universe expanded at a reaally accelerated rate just after the Big ...
- 111
3
votes
2
answers
361
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Is the commonly accepted Universe age of 13.8B years really accurate? [closed]
Hmm...challenging the error margin of a specific calculation result of a specific model based on confirmed inconsistencies is regarded as "opinion-based". Interesting. Just curious, is the ...
- 4,452
1
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1
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919
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Is there a relationship between Black Holes and the Big Bang?
As the question mentions, is there a relationship between the Big Bang and Black Holes? It appears the Big Bang is a ‘tacked on’ theory that doesn’t align with current theories (since we don’t know or ...
- 257
2
votes
2
answers
532
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Is the expansion of the universe really accelerating? Or does it just look like it?
I pulled this quote from an article on the Hubble Constant:
"...for example, if the Hubble Constant was determined to be 50 km/s/Mpc, a galaxy at 10 Mpc, would have a redshift corresponding to a ...
-2
votes
3
answers
253
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Could Dark Matter/Energy be explained by a second universe? [closed]
Is it possible that prior to our current universe's Big Bang, there was a universe made up of Dark Matter/Energy created from a prior Big Bang? Its physics/matter could have been different than what ...
- 15
4
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1
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What is the difference between the Big Bang Model and the Λ-CDM Model?
If I'm going to write about "The Consensus Model of Cosmology" should I include Big Bang Model or should I go with just the $\Lambda$-CDM Model?
2
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3
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346
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What evidence is there that universe will not shrink again?
There are theory that universe eternally expanding and shrinking, so that every event and our lives will repeated again. At the other hand some scientists thinks that it will not shrink again because ...
- 349
0
votes
1
answer
55
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Is it possible for the universe to be already developed when the dark energy appeared and expansion started?
The main piece of evidence that supports Big Bang Theory is basically evidence that the expansion of the universe started long time ago (not necessarily from the begining of the universe).
Is it ...
- 1
1
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2
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Big Bang...or...Everywhere Stretch?
Recently I watched a minute-physics video that suggested that a better name for the beginning of time would be "Everywhere stretch" because there wasn't a space-time singularity that formed ...
- 2,983
0
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1
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938
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Can someone explain effects of time dilation on expansion of universe [duplicate]
I'm not a physics guy, but this is something I have always wondered about. If a clock flown by an object of high mass runs slower, what is the effect of this in regards to the density of the universe. ...
- 101