All Questions
Tagged with big-bang-theory universe
37
questions
4
votes
2
answers
361
views
Was the Big Bang an event within a preexisting Universe, or did it mark the beginning of the entire Universe, beyond just the observable Universe?
Could it be that the Universe is truly infinite, and the Big Bang was merely a singular, specific event that resulted in the birth of a 'bubble,' i.e. what we perceive as 'the observable universe'? ...
- 4,719
2
votes
0
answers
69
views
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 ...
- 315
51
votes
7
answers
12k
views
What is in the center of the universe?
If the universe has formed & originated by a Big Bang Explosion, then there must be empty space left in the center of the explosion site, as all the matter is travelling at tremendous speeds away ...
- 297
1
vote
1
answer
78
views
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, ...
- 1,494
5
votes
1
answer
293
views
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 ...
- 156k
3
votes
0
answers
61
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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 ...
- 131
2
votes
1
answer
357
views
Because the Universe is expanding, what is it taking up?
It is my understanding that the universe is expanding and that matter takes up space. While the universe only contains small percent of matter, wouldn't expansion indicate that the universe is ...
- 13
1
vote
1
answer
40
views
Can two neighboring galaxies move apart at steady speed?
While I was trying to understand the three models that obey Friedmann's two assumptions of a non-static universe, I came across a line that says and I quote "It (referring to Big Bang) starts at ...
- 4,787
2
votes
1
answer
345
views
A universal reference point [duplicate]
I would like to use a system of co-ordinates (x,y,z,t) based on a specific well known point. My original choice (the center of the universe in the big bang theory, Bigbang0), was wrong as the universe ...
- 137
1
vote
1
answer
111
views
Shouldn't the estimate of the universe's age be higher, not lower, after the attractive strength of gravity is taken into account?
From 'Fundamentals: Ten Keys to Reality', by Frank Wilczek :
"Running the movie of cosmic history backward in our minds, we found the galaxies all coming together to meet at a definite time. ...
- 3,914
0
votes
1
answer
74
views
Centre of the Universe [duplicate]
Why shouldn't the original singularity of the big bang happen to be the centre of the Universe? Assume that the universe is expanding isotropically with a constant speed.
- 151
0
votes
0
answers
64
views
Was universe spawn from nothing? [duplicate]
Was universe spawn from nothing?
Until now, scientists figured out that the Big Bang happened from a tiny particle which was infinitely energy densed and having infinite mass. If that is the case ...
- 1,007
1
vote
1
answer
872
views
How can something infinitely big have expanded from an infinitely small?
Please help me reconcile what I see as contradicting theories:
The universe began with the Big Bang and expanded from an infinitesimally small point.
The universe is infinite.
How can something ...
CommunityBot
- 1
8
votes
1
answer
256
views
How do we know so many details about Big Bang, but we do not know if Universe is finite/infinite?
I understand that this question may be too vague, but I am confused about the following:
On one hand we know a lot of "details" about Big Bang, like really precise details, evolution of universe, age ...
- 657
18
votes
5
answers
12k
views
How can the universe be infinite?
I've heard from renowned astrophysicists that we don't yet know whether or not the Universe is infinite. How is that possible regarding the big bang theory is accepted (as they all do)? Are they ...
