Hello Janus, would you mind answering a quick question please? We do not with our eyes see visible light between objects although with our eyes we can detect it to see . We can detect and see CMBR between objects by device?
That's because there is nothing "beyond" the expansion. The expanding universe consists of the whole of reality. While their is a difference between the Observable universe vs the universe at large, this does not mean that Universe itself is infinite. It can in fact be finite, yet boundless The problem here is that you are limiting yourself to only thinking in Euclidean geometry terms. Our universe is not Euclidean as a whole and you are basing your view on an overly simplistic model.
Since the CMBR is throughout the universe, anywhere you put a device you would detect it. The only way to "detect" anything is to interact with it, either directly or indirectly. Either it interacts with our sensors, or it interacts with something that then interacts with our sensors.
There is nothing beyond the expansion according to one theory, I do not think that applies to set in stone or is any sort of poofs. I have no problem if that is your belief and conclusion but I do not think there is many people who believe there is no beyond.
That depends on who you mean by many. The majority of cosmologists of this opinion, while maybe not many in the general populace. But since the first group is made up of actual experts in the field, I would weigh their view much more heavily in the matter, even if they are a minority when it comes to the public at large.
With infra-red, we are dealing with wavelengths that are still close to those directly detectable by the eyes, so it doesn't take much of a shift to get a visible representation. With the CMBR, we are dealing with microwaves, which are many, many times longer. The wavelength set a limit on resolution, so you just wouldn't see much in a one to one translation. In addition, While extensive, the CMBR is not that intense, and it generally take some observation time to collect it. What we can do is after collecting the data is make visible representations of the CMBR like this map of the entire sky made from data collected by the COBE satellite https://cdn-images-1.medium.com/max/1600/1*3GVdyhcnWU169ZLgZGfg_Q.png
Unfortunately I still dont understand. I think an astronomer looks at an object and determines its red shift and uses that red shift to determine the distance and the rate space is expanding. You dont seem to say that and I wrong? Alex
Imagine a dark train tunnel and you are at one end and a second person standing next you is about to walk through the tunnel using a lighter for light. At the start you have no idea how long the tunnel is , all you can see is the darkness and your vision is limited to this. In this example we will say your vision distance of the tunnel is 0 meters. Now when the other person walks through the tunnel this now allows you to see the distance and you see the distance expanding the further the person walks through the tunnel. So I consider the Universal expansion is a bit like the tunnel and the galaxies are walking down the tunnel.
Thank you , so your link shows a drawing of the CMBR and we assume CMBR is everywhere, why do we assume that when we can only measure locally?
I see what you suggest. So in your model the tunnel stays the same length? Probably best to think of it this way... You walk into a tunnel with your light but as you walk there are miners digging and extending the tunnel at lets say the speed of light and they move away from you such that by the time you get to the place they were working they have dug much much further. You seem to think the expansion is only related to our ability to build a more powerful telescope that peels away distance but the current model does not agree and even if I am a little wrong I am more aligned with the current model I hope. Alex
Could it be radiation "turned back" at the heliosphere to bounce around the inside of the solar system (in side being the region inside the heliosphere and not interstella space). Could it be our own tv and radio signals running around "inside" or simply radiation bounced back but originating from the Sun. How can we tell it is from where the current model explains? Alex
The CMBR is in the upper microwave region, a higher frequency and shorter wavelength than radio or TV transmissions. These frequencies don't travel far through air and are not used for communication except of very short distances and thus would not escape our atmosphere to be reflected back. There is no mechanism that would cause lower frequency radio waves to increase their frequency to the microwave range. In addition, I don't see the Heliopause as being the type of sharp boundary that would cause this type of reflection and even if it was, it would be more defined in the direction of "Bow shock" and thus we should see a greater intensity in that direction. The CMBR was first detected in 1964. Our radio noise has increased since then. If we were just getting our own signals back, there should have been a noticeable change in the intensity over that time. This has not been noted. So there are a number of reasons to rule out this explanation.
What is the difference between detected light and detected CMBR? I believe some of your members have mental issues , they seem to think I am somebody else. I think they must of done far too much forum time.
