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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
493 166,517
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 45,170
Are there any programs which could be used to fit the Supernova data to constrain the cosmological models's parameter?...
Mar27-11 10:11 PM
micomaco86572
3 788
Expansion of spacetime stretches wavelengths and produces the red shift. Does it also stretch the amplitude of the...
Mar27-11 01:52 PM
SteveinLondon
3 1,726
Does it make sense to say that the universe has an edge/boundary? Neutrinos are moving all the time with...
Mar27-11 01:18 PM
ZeroKelvin
5 3,709
I've heard a lot about fine tuning but Roger Penrose on this website http://www.ws5.com/Penrose/ which is an excerpt...
Mar27-11 02:07 AM
yenchin
2 2,691
Good people, As a 45 year old IT-PM, with no scientific / academic affiliations, can I ask, what I think should be,...
Mar26-11 05:20 PM
Chalnoth
35 3,631
I think this conversion is so valuable, I decide to share it with you all. We come up with two models, one is playing...
Mar26-11 03:42 AM
Chalnoth
3 1,049
Source: http://www.indystar.com/article/20110320/LOCAL01/103200369...
Mar25-11 05:43 PM
Vanadium 50
3 3,668
Big bang suggests that there was only a concentrated mass.was there no space?If there was no space where did it come...
Mar25-11 04:57 PM
jtbell
81 15,045
When Einstein conceived GR he added the cosmological constant in an attempt to create a static universe model. The...
Mar25-11 04:03 AM
TrickyDicky
7 2,483
While listening to a talk on TED by David Deutsch (the talk was "Our Place in the Cosmos" from July 2005), he made a...
Mar25-11 01:12 AM
phinds
10 1,131
The LHC is supposed to create conditions similar to the big bang. Although energy densities, temperatures and other...
Mar24-11 03:36 PM
M. Bachmeier
6 1,349
Is there a difference between Cosmology and Cosmic rays ?
Mar24-11 03:28 PM
Nabeshin
2 814
Detecting Vanishing Dimensions via Primordial Gravitational Wave Astronomy:surprised...
Mar24-11 03:05 PM
J.F.
2 1,423
This might seem simple to some of you on here, but I have a question that's been bothering me, most likely due to my...
Mar24-11 12:06 PM
Sciurus
5 1,576
what does it say about inflation? I understand it has a simialr result to matter boucne in Loop Quantum Gravity is...
Mar24-11 07:01 AM
skydivephil
0 555
If I'm correct Planck will publish its all-sky CMB map (foreground deducted) this year. What's to be expected from...
Mar24-11 03:15 AM
Chalnoth
2 1,491
Are there any programs which could be used to fit the Supernova data to constrain the cosmological models's parameter?...
Mar23-11 07:57 PM
micomaco86572
0 570
Not that it has become so small it is undetectable; but the point from which it was emitted is such a distance away...
Mar23-11 07:41 AM
Tanelorn
7 1,528
We know that the particles in the hot universe obey Fermi/Bose statistics, but when we calculate the scalar dynamics...
Mar23-11 02:42 AM
Chalnoth
1 1,119
The word 'cosmos' is defined as an orderly harmonious systematic universe. There are some people who actually think...
Mar22-11 01:19 PM
Tanelorn
6 3,053
Just reading the Physorg article on the new numbers on the expansion of the universe. While sipping my coffee a...
Mar22-11 12:42 PM
Tanelorn
10 1,633
I have seen a few other similar posts but wanted to add my thoughts. Is gravity the space between bubbles of dark...
Mar21-11 04:42 AM
Chalnoth
9 2,903
You know how the lambda constant just grew exponentially in the first second of the universe? That was just a...
Mar20-11 04:42 PM
Farahday
4 1,333
Assalamualykum I’m a non-math person, but that doesn’t deter me from being logical and rational who churns out...
Mar20-11 07:20 AM
ZapperZ
20 3,019
I was reading about the VSL theory as an alternative solution to inflation that solves the horizon problem. My...
Mar19-11 03:16 AM
Chronos
5 1,104
Does this question have an answer? Does the beginning of time coincide with the Big Bang? Is it appropriate to ask...
Mar17-11 09:50 PM
petm1
98 73,383
How was the big bang possible considering the 1st law of thermodynamics. Was all energy and matter created during the...
Mar17-11 02:45 PM
Chalnoth
2 1,445
The title says it all. With all that mass in such a small space it must have been one, but then everything would have...
Mar16-11 07:58 PM
bcrowell
43 6,742
Sometimes we need to calculate the evolution of the scalar field \phi with the equation of motion \frac{\partial^2...
Mar16-11 05:57 PM
Accidently
10 1,875
Usually at first, when trying to understand what universe expansion is, one asks: what is the universe expanding...
Mar16-11 11:25 AM
marcus
29 4,296
I hear a lot about astronomers using type IA supernovae to accurately measure large scale distances over billions of...
Mar16-11 03:48 AM
Chalnoth
4 2,324
Dark Energy Cosmology makes the front page again: In a new study, a team of researchers led by Adam Riess of the...
Mar16-11 02:05 AM
Chalnoth
1 892
Hi everyone, First time posting, sorry if this is in the wrong format or wrong place. For a project in a cosmology...
Mar16-11 12:40 AM
marcus
5 2,012
Okay...
Mar16-11 12:13 AM
granpa
1 839
In the following video Penrose states that the Universe was so special and organized at its initial state the figure...
Mar15-11 10:43 PM
revo74
2 1,643
Shot in the dark here, don't really know if these exist. 1. An idea that time would run backward if the universe...
Mar14-11 09:45 PM
Beer w/Straw
3 1,080
If there is duality, at the big bang, when matter and antimatter was created, why did the balance shift to matter?...
Mar14-11 01:36 PM
nickthrop101
3 1,891
Dear All As I have understood, there will be only cooling chunks of matter like stray planets, neutron stars, brown...
Mar14-11 12:16 PM
kriku
7 1,196
I have only a basic understanding of science, but don't the Second Law of Thermodynamics and the concept of entropy...
Mar14-11 03:45 AM
yenchin
15 2,326
Greetings, I read a lot. It is often repetitious. Occasionally I read an idea or way of looking at something that I...
Mar13-11 09:45 PM
ApplePion
4 1,259

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