3 ms·
Is it possible to difereciate between a expanding universe due to the big bang?, or an expanding universe due to this part of universe coming out of a more comp
by omegant 13y ago
Is it possible to difereciate between a expanding universe due to the big bang?, or an expanding universe due to this part of universe coming out of a more compressed stream (like coming out of a 3d venturi tube). I don't know if that makes sense.
And if red shifted light is not red due to the expansion, but due to some kind interaction with dark matter?.
I suppose this questions are dumb, and surely they have been discarded and replyied lotsof times, but never found that info. Does any body know a place were this kind of thinks are explained?
- cpleppert 13y agoI would say not really! The real problem isn't the effect can't be replicated it is that replacing cosmological expansion with something else requires the something else to exactly mimic all the other things we can observe about the universe. Dark matter is a great example. Due to gravitational lensing this can mimic directly the redshift we can observe. But then you have to explain how all this dark matter is distributed(not to mention created) in a way that doesn't mimic cosmic expansion in one part of the sky but everywhere at once. I found the teaching company course on cosmology(from what I saw of it) to be absolutely fantastic as a general introduction: http://www.thegreatcourses.com/tgc/courses/course_detail.aspx?cid=1830 http://www.thegreatcourses.com/tgc/courses/course_detail.asp...
- omegant 13y agoThank you very interesting, I´ll check it. Some times I get the feeling that somehow in cosmology there is some kind of advanced modern day epicycle squeme that is giving correct predictions but is not really what is out there. I just love to follow the advances in cosmology.