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Quality answers to common cosmology questions
Jun25-11 08:50 PM bcrowell 

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Cosmology

- The origin, evolution, structure and eventual fate of the universe.
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To have an enjoyable cosmo forum we needed a balance between mental freedom on the one hand and a shared knowledge...
Apr8-14 08:39 AM
Jorrie
483 125,496
The new A20 tabular calculator lets you look at changing geometry out to about 88 billion years according to the...
Feb8-14 08:31 AM
mfb
61 23,572
I was watching a video on the JIMO mission to Jupiter's moons: Ganymede, Europa and Callisto. What is the approximate...
Jun9-10 09:49 PM
stevenb
2 946
What exactly is going on in physics and with the standard model of cosmology? We had a model that seemed to...
Aug17-10 11:32 PM
Chronos
11 1,777
What's the probability of a universe capable of life? In other words, what's the probability that the laws of the...
Jun15-10 04:56 PM
Chalnoth
15 1,907
Last night while thinking about galaxies with seemingly large DM halos and me being the skeptic of DM as I am, I got a...
Dec18-11 02:48 AM
Markus Hanke
13 2,637
What experimental evidence or optical measurements are used to prove that red shift is due to gravitational fields of...
Oct10-11 10:05 AM
marcus
26 3,394
What is wrong with assuming a fixed size universe, dividing it into 8 octants, and allowing the various octants to...
Oct9-11 09:17 PM
George Jones
7 1,399
With 90% of the observable matter in the universe being Hydrogen (H2), why is it that the microwave background is...
May19-08 01:12 AM
pixchips
6 3,846
Hi clever people. much respect. Just wondering, if our closest star went super nova. how would it affect the earth,if...
Jan16-12 05:01 PM
cmb
20 4,042
I am a molecular biologist but cosmology is my "hobby". I have some questions about some seeming inconsistencies I...
May22-10 09:18 AM
emc2cracker
2 1,010
I came across this article online recently and found it interesting. I thought I would share it since many members...
May12-09 03:32 PM
buffordboy23
4 2,850
Sorry if someone already posted this link but did anyone see this in the news? ...
Apr10-12 04:42 PM
Georgie
6 2,058
Here it is, its probably an old one but as im not a fully fledged scientist I dont know if it is. It relys on paralel...
Jan18-11 11:14 AM
burgerdave
7 1,648
I have long wondered about this. When light takes x number of billion years to reach earth, we judge that the star...
Mar4-06 01:09 AM
Chronos
8 2,903
Hey all, Just to make it clear I am in no way a scientist or physicist but a mere space enthusiast. Yesterday I...
Jan27-13 09:41 AM
Naty1
3 704
I was reading that the universe will repeat after its done. http://seedmagazine.com/content/article/a_cyclic_universe/
Jul1-11 11:46 AM
bcrowell
15 1,959
Wouldn't the Doppler effect stop us from seeing the beginning of the universe unless it starts approaching us? (or...
Jul22-08 05:01 PM
marcus
11 1,646
Should not we say "the universe WAS expanding" rather than "IS expanding" since the red shift augments as we go back...
Jan17-13 05:59 PM
GeorgeDishman
96 12,949
Why is not gravity relative like the space-time continuum, since it operates on and is modifying it? Why is gravity...
Apr8-12 10:46 PM
Nabeshin
18 2,292
Before I post the question, I must state for the record that I am a grunt so please be gentle with me. My question is...
Jun6-09 10:33 PM
Chalnoth
8 1,339
I would first like to thank everyone on this website. So much knowledge i haven't been able to leave. Im researching...
Feb22-11 11:08 PM
cepheid
3 1,614
I doing research on the state of the universe before and after Inflation for a science fiction book im writing. In...
Apr16-11 04:15 PM
bapowell
25 2,814
Ok so I'm a bit confused as to how to attempt to answer this question? Describing its significance vs explaining its...
Apr6-14 10:02 PM
marcus
9 291
Please clarify and tell me where I am wrong. Before the big bang Time did not exist, nor mass, nor energy, nor...
Mar18-09 04:27 PM
marcus
3 1,245
What is the ratio of energy contained in photons vs energy contained in neutrions in the present universe? Also, how...
Oct4-11 02:29 PM
nicksauce
4 1,509
Are there any evidence that universe is expanding other then redshifting of EM radiation?
Dec7-09 04:42 PM
Tyrgrendi
3 1,380
Hi all, I was wondering what some of you thought about 'Information Theoretic Process Physics'? The topic seems...
Mar5-06 06:15 PM
yanniru
2 2,761
Where did the initial particles or forces that were apart of the big bang come from, because they had to come from...
Oct7-08 05:42 AM
Grogerian
5 1,108
I know that the matter within our universe had to be created or something. But the universe itself, is it possible...
Oct9-08 02:34 PM
cam875
9 1,293
I understand that it is said that the universe is expanding and all that but where did all the matter come from that...
Mar14-09 08:43 AM
Chalnoth
9 1,815
is the rate of expansion of the universe constant? or is accelerating or decelerating? can anything such as light...
Mar15-09 08:42 AM
cam875
7 1,414
how does cosmology explain that the creation of the universe was not a perfect uniform event in all directions type...
Mar18-09 08:55 AM
Chalnoth
3 1,039
I read it is possible for the universe to be expanding faster than the speed of light. What would be the...
Jun14-09 12:13 AM
Chronos
58 5,581
Hello, Is it possible for this to be.... ? Could it be that the whole universe will eventually become so full...
Nov16-10 03:20 AM
Driftwood1
11 1,455
Alright, I'll start off just saying, the title really isn't my question, but it is related. I was tasked with the job...
Oct27-13 11:58 AM
marcus
5 826
I have recently been studying cosmology in my free time, but I came across something that strikes me as rather odd....
Apr21-11 07:03 PM
phinds
38 5,724
I am doing a project in school and am looking up different cosmological models to research. I have found Steinhardt...
Apr19-11 10:31 PM
cansay27
2 1,263
I'm not sure whether this belongs in this topic or Beyond the Standard Model. I was reading through various...
May2-11 08:36 PM
Drakkith
3 1,866
I am reading Cycles of Time by Penrose, page 71-72. Could someone explain if the universe started out with at a state...
Feb18-13 03:12 PM
Naty1
8 1,030
I was thinking maybe the universe isn't in the chaotic state its meant be in. Rather a more organised state and the...
Apr8-13 10:46 AM
Mordred
11 1,051
This is my first post and while I have more degrees than a thermometer none af them have anything to do with this...
Mar30-08 07:02 PM
russ_watters
17 2,899

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