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'? ...
- 51
2
votes
0
answers
69
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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 ...
- 315
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, ...
- 1,017
5
votes
1
answer
293
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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 ...
- 133
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 ...
- 129
1
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1
answer
40
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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 ...
- 11
1
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1
answer
111
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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. ...
- 5,307
0
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1
answer
74
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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.
- 1,296
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0
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64
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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
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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 ...
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8
votes
1
answer
256
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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 ...
- 181
0
votes
1
answer
208
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Have we measured or found evidence of a detectable origin point of the big bang? [duplicate]
Based on reading the wiki page of the big bang, a simple question with a probably not a simple answer came to mind.
The statement on the wikipedia page was.
Since Georges Lemaître first noted in ...
- 437
4
votes
1
answer
123
views
How can you verify the theories presented on TV shows like "How the Universe Works" is current and/or valid? [closed]
There are many TV shows such as "How the Universe Works" that explain theories about the origin of the universe such as the Big-Bang Theory.
What resources can I access to verify the scientific ...
- 41
1
vote
1
answer
201
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Is it possible that the Universe is expanding due to additional Big Bang events?
Is it theoretically possible that the Universe is expanding due to additional Big Bang events that have occurred at the same location that the original Big Bang occurred at?
Perhaps there has been an ...
user23327
1
vote
1
answer
627
views
What is beyond the observable universe? [closed]
What is beyond the edge of the observable universe? Scientists say that the Big Bang is the cause of all creation in the known universe, but it would seem the bang must have happened in the center of ...
- 133
4
votes
3
answers
1k
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How can the universe be expanding faster than speed of light? [duplicate]
So the story goes like this:
A long time ago, 13.799±0.021 billion years to be exact, something happened. It was a big bang, loud explosion and universe came to existence. It grew and grew, and now ...
- 701
0
votes
1
answer
296
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Why do we we even exist? [closed]
It came to my mind one day that why does this universe even exist and why do we even exist and like we are enclosed in the so called atmosphere and a floating rock in space called the Earth, so is ...
- 111
4
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1
answer
473
views
What existed before the big bang [closed]
What existed before the big bang?
What all thing are there inside big bang object ?.
- 141
2
votes
1
answer
230
views
How can we use hypervelocity stars to determine the origins of the Universe?
I was reading this article finding evidence of Universe's origin, which describes that in 1 trillion years we may lose the ability to determine how the universe was created.
The answer seems to be ...
- 231
3
votes
1
answer
903
views
What was "space" like before big bang?
I have a simple question which I think about often but have no answer.
If The Big Bang is true, than if the whole space was just a point 14 billion years ago, then what was around that point, some ...
0
votes
1
answer
241
views
Second Big Bang [duplicate]
Just say you are immortal and will live forever. Since the universe is claimed to be unstable, what would happen after it ends? Would all of the universe's mass just fly back into another compressed ...
- 103
1
vote
1
answer
404
views
How do we know that the Universe is still expanding now?
Yes, I know that most galaxies have a red shift and that means they are moving away from us.
The problem is that the farthest galaxies are 13.8 billion light years away. That means that the info is ...
- 113
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
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2
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229
views
Could we estimate the age of the universe based on the planar property of the Solar System?
The Big Bang scattered planets and stars everywhere in three dimensions.
But after billion years of moving and interacting with each others through gravity, planets moved on the same plane.
Given ...
- 119
5
votes
2
answers
293
views
Is mass+energy conserved when a new universe forms inside a black hole?
My understanding is that there are credible theories out there in which the formation of a singularity in a black hole also represents the beginning of a new universe via a big bang. We can't see the ...
- 369
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2
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855
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Calculating the age of the universe
Is the calculated age of the universe that of the visible universe or the entire universe? I dont know how the age is calculated but if it is believed that all we see visibly IS the entire universe ...
- 113
4
votes
1
answer
1k
views
Big Bang / Big Crunch cycle?
I've been reading some of Stephen Hawking's work on the theory of the expansion (and ultimate contraction) of the universe and was curious if anyone has every hypothesized that the universe has ...
- 143
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votes
3
answers
579
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How is the universe bordered?
This answer says that some models describes the universe as finite. How do those models describe the universe's border?
Does the border (theoretically) exist?
Is it a solid border? Do they predict ...
user2734
6
votes
2
answers
630
views
Outside of a Universe and its origin
Per the Big Bang Theory, the universe was formed from a dense singular point which existed 13 billion years ago and has been expanding ever since. This suggests that the point should have existed ...
- 171
19
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3
answers
4k
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How can the 13.8 billion years old universe have a radius of 46 billion light years? [duplicate]
The universe is about 13.8 billion years old. Assume at the big-bang it starts from a small region and the maximum possible speed according Einstein is the speed of light how can the universe got a ...
0
votes
1
answer
227
views
Does science need support from religion or philosophy to explain the creation? [closed]
Science is trying to explain how the universe is made. The beginning of the universe explains the Big Bang theory. But what happened before Big Bang? Science cannot go before that. So, does this mean ...
- 29
18
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5
answers
12k
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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 ...
- 1,037
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1
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620
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The reason behind Big Bang
It always amuse us to research about things around us and we always start our research with a question that - what must be the reason for happening of that phenomenon?
As we know that the formation ...
- 207
4
votes
2
answers
1k
views
Why are distant galaxies not visible in the observable Universe?
Assuming that the Universe is and has been expanding ever since its creation (Big Bang theory), the galaxies that are now at the 'edge' (not visible theoretically) must have been (at some point in ...
- 155
4
votes
1
answer
677
views
How far are we from the edge of the Universe? [duplicate]
Following the Big Bang the Universe continues to expand, presumably and roughly equally in all directions. It is understood that the Big Bang occurred 13.798 ± 0.037 billion years ago.
Is there any ...
- 901
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 ...
