Linked Questions
60 questions linked to/from Why is the observable universe so big?
16
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How can a quasar be 29 billion light-years away from Earth if Big Bang happened only 13.8 billion years ago? [duplicate]
I was reading through the Wikipedia article on Quasars and came across the fact that the most distant Quasar is 29 Billion Light years. This is what the article exactly says
The highest redshift ...
- 161
14
votes
2
answers
2k
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How is it possible the universe expanded faster than the speed of light during inflation? [duplicate]
In a documentary written in collaboration with Stephen Hawking, the narrator (supposedly Stephen Hawkings) says that by the time the cosmos was 10 minutes old, it had already expanded thousands of ...
Lisa Jacobs
12
votes
3
answers
626
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How can the diameter of the universe be so big, if nothing can go faster than light? [duplicate]
The following are facts of the prevailing cosmological model.
The age of the universe is about 13.772 billion years.
Nothing with mass can exceed the speed of light.
The diameter of the observable ...
- 143
0
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1
answer
5k
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How far away is Cosmic Background Radiation? [duplicate]
I've been reading about Cosmic Background Radiation (CMBR) lately. My understanding so far is that this is the "Noise"/"Flash" from the big bang. Assuming that information is correct, how far away ...
- 161
5
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1
answer
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Speed of light and current dimensions of the universe [duplicate]
I've seen several documentaries explaining that the diameter of the universe is currently estimated at over 90 billion light-years. And which that - in the face of the age of the universe being about ...
- 51
4
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1
answer
767
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Diameter of the universe [duplicate]
Should the diameter of our universe always be more than its age in light years?
As if the distance between any two points in the universe is equal to 13.5 billion light years then the light from the ...
-1
votes
3
answers
882
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Was Einstein wrong when he said nothing can go faster than the speed of light? [duplicate]
If the universe is constantly expanding faster than the speed of light, how could Einstein be right?
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2
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2
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726
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How is observable universe so big if the universe is so young? [duplicate]
The diameter of observable universe is 93 billion light years but the age of universe is only estimated to be 14 billion years. So how does light have 46.5 billion years to travel from the boundary of ...
1
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1
answer
504
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How did the universe get so big so fast? [duplicate]
The universe started at the big bang around 15 billion years ago.
The universe is now at least 92 billion light-years in diameter.
Together, don't these mean that the universe, at some time in the ...
- 169
1
vote
0
answers
815
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How is the Universe expanding faster than the speed of light? [duplicate]
I was watching a youtube video about the expansion of the universe. So the video said that the universe is expanding at a speed faster than the speed of light. I have 2 questions about that. My first ...
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3
votes
1
answer
241
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Many times speed of light [duplicate]
http://www.huffingtonpost.com/2014/03/24/theory-of-everything-big-bang-discovery_n_5019126.html
What does "many times speed of light" really mean in this context? For a layman it's easy to draw wrong ...
- 225
1
vote
2
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613
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Isn't the universe older than 13.8 billion years? [duplicate]
To preface this, I'm not an expert, I'm just an avid astronomer with little mathematical knowledge.
I was watching a video that was explaining the cosmic scale and how the observable universe is only ...
- 289
0
votes
0
answers
542
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If nothing can travel faster than the speed of light, how can there be parts of the universe we can't see? [duplicate]
Assuming we originated from a single infinitely dense point in space time in the big bang, how can there be parts of the universe that we can't see as the light has not reached us yet, if nothing can ...
- 109
1
vote
1
answer
417
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If nothing can travel faster than speed of light then how the Universe is only 13.7 billion years old? [duplicate]
The light would take 93 billion years to reach the edge of universe but nothing can travel faster than the speed of light not even the big bang?
0
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1
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245
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Was the expansion after the big bang faster than the speed of light? [duplicate]
I think it's called Planck time and it's the speed at which matter spread during the big bang. Was the big bang expansion faster than the speed of light?
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