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Cosmology

- The origin, evolution, structure and eventual fate of the universe.
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Quality answers to common cosmology questions
Jul23-14 11:07 PM Greg Bernhardt 
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Jan16-12 Greg Bernhardt
To have an enjoyable cosmo forum we needed a balance between mental freedom on the one hand and a shared knowledge...
Aug2-14 07:51 PM
marcus
493 167,952
The new A20 tabular calculator lets you look at changing geometry out to about 88 billion years according to the...
Jun11-14 11:00 AM
Jorrie
65 45,993
Regarding Universe Expansion: Does the fabric of SpaceTime play a role in regulating the expansion of the universe?...
Mar20-06 09:49 PM
Prairie
3 1,518
Are we in the middle of the universe? I mean, imagine the universe is some sperical or odd shaped three dimensional...
Aug28-10 04:26 AM
-1/12
13 2,082
OK, We can see the universe out to about 13 or 14 billion light years. Can we see it in all directions, or are some...
Jun18-10 04:02 AM
Chalnoth
22 2,247
Hi everyone - I'm having some trouble with the real concept behind "degeneracy" of dark matter. I've heard of...
Apr2-07 07:34 AM
Wallace
3 1,473
When did the cosmic strings form? Who can tell me the range of this time.
Mar25-08 03:03 AM
princeton118
0 1,062
hey all, i'm going to be doing a presentation for my astronomy module, and i was thinking that i should talk about...
Sep7-10 09:13 PM
Redbelly98
58 6,842
Hello friends! Forgive me, I have another question for you physicists. We see those active galactic nucley which show...
Sep19-11 03:17 PM
DaveC426913
5 1,627
Hello, friends. I read that polar anisotropy of the CMB shows that the solar sistem is moving towards the Virgin...
Sep17-11 08:35 AM
profgemelli
20 3,317
As the title suggests, I am wondering if there is an alternate way to describe the expansion of the universe outside...
Aug8-11 03:18 PM
BillSaltLake
12 2,120
Well I know I'm not allowed to debate about my religion here, but I want to attempt to SCIENTIFICLY refute any claims...
Jun3-09 08:16 PM
ZapperZ
2 996
by the weins displacement law can we find out the temperature of any black body if we have the lamdamax and the...
Dec27-07 05:52 AM
pseudo
0 1,971
So apparently, nuclear fusion in stars can account for elements ranging in size up to iron. And supernovae are also...
Mar1-08 02:45 PM
PseudoIntellect
0 1,446
Forgive me if I have used the wrong phrase to characterize the phenomenon. If my understanding is flawed, someone...
May15-06 02:18 PM
SpaceTiger
21 2,258
I was listening to Coast to Coast radio this morning on the way to work and they had some scientist on who was saying...
Oct27-06 11:08 AM
SpaceTiger
6 1,664
I was watching Parallel Universes on the Science Channel the other night and they presented a theory where multiple...
Dec16-06 11:16 AM
krateesh
1 3,475
It makes no mathematical logic to say the universe started with a minute pinhead sized mass that suddenly exploded and...
Oct3-13 03:35 PM
Khashishi
3 1,656
Hello, Let me first start off by saying that I have no formal Education or background in Physics or Astronomy save...
Jan27-12 07:47 AM
yenchin
12 2,068
Hi all, While the articles I have been reading are about a year old (which can be considered relatively outdated in...
Feb20-12 03:29 AM
Chalnoth
11 1,759
- is it a fair enough statement to say that gravity is both infite in range and instantaneous in effect? - if you...
Feb17-11 04:26 AM
Chalnoth
18 2,407
I believe it is possible to have an endless universe and for it yet to have an edge. Think of the universe as a...
Dec8-07 08:46 PM
pyrojelli
0 1,648
Just a physics buff so bear with me, this has been bothering but I am sure there is a simple answer. I watch a lot...
Jul8-09 11:46 AM
marcus
24 2,016
If there were no Space-Time before the Big Bang, then where did that explosion took placed?
Jun20-11 12:26 AM
narrator
15 2,545
I read an article in this months Discover magazine that stated that cosmic rays are atoms of the elements from...
May24-06 11:18 AM
Qmon
6 1,838
Hi All Let's assume the Universe's topology is a standard hypersphere (i.e. it's finite) and it's only a bit...
Apr21-09 03:12 AM
qraal
14 2,072
This article on 4th Quantisation http://arxiv.org/pdf/1304.0259v3.pdf Takes the WDW equation to 3rd Quantisation...
Apr22-14 07:02 AM
bapowell
3 484
In QFT the background field is 2nd Quantised as opposed to remaining classical What exactly gets 2nd Quantised in...
Apr21-14 09:30 PM
Mordred
1 433
I have just seen this paper on constructing a cosmology for the accelerated expansion of the universe through...
Apr21-14 09:54 PM
Mordred
3 486
If the DeSitter Universe is modelled by Empty Universe 1. Very Early Universe with Inflaton Field 2. Very Far...
May31-14 06:28 AM
Quantizer
4 575
Given The Hawking-Hartle state is an initial state of the very early universe If the universe very far in the...
Jul1-14 03:36 PM
PeterDonis
15 2,245
Hi: The principle states that : the universe is homogeneous and isotropic. Then we have three solutions often...
Jan28-07 07:39 AM
Garth
3 2,598
American Scientists Online: see full issue: September-October 2007 Other Formats: PDF Modern Cosmology: Science...
Aug31-07 08:48 AM
oldman
12 3,324
What went bang to start everything?
Aug31-07 10:29 AM
ZapperZ
4 3,014
This is a big hole in the sky. Although you can't see it with the naked eye it actually covers almost 3 degrees of the...
Jan29-08 09:31 PM
Loki Mythos
65 11,145
I know that electromagentic waves do not need any type of medium, but why wouldn't it be possible for dak matter to...
Jun1-06 05:36 PM
selfAdjoint
7 1,989
I was reading in some "Discover" magazine on the universe in which they were talking on the pre-Big Bang universe with...
Dec23-09 05:00 PM
QuantuMekanic
0 1,299
:confused: How much physics do i need to know to embark on cosmology Do i need to be a complete expert in GR???
Nov12-07 04:02 PM
Wallace
7 4,935
Is our universe a 3 sphere expanding in time into nothing?????? OR i
Dec14-07 03:50 AM
cristo
1 2,204
Is there an event horizon beyond the visible universe where the laws of physics kind of get cut off, a limitation to...
Aug13-12 03:51 PM
Khashishi
15 2,950
If you take it to its extremes and space continues to expand at an accelerated rate, what happens when? 1) space is...
Aug20-12 11:08 AM
Aimless
12 1,793
Ok so me and a few of my physics (& Maths) friends were arguing this. I argued that it must be finite in size,...
Mar14-12 02:21 AM
bill alsept
115 15,870

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