Quote:
|
Originally Posted by Sam5
I certainly don’t know how it started. This question has been puzzling mankind for the past 50,000 years. But this “expanding space” nonsense is new and it’s designed to keep Einstein’s “speed limit of ‘c’” seem wrong. That’s all it’s for. This didn’t start until a decade or so ago, when they began finding galaxies with redshifts that suggest they are superluminal. Before that, they went with the “explosion theory”, although they didn’t like it very much. They avoid the “explosion” idea right now just by not talking about the “beginning”. That’s why Eddington invented the “balloon model” in the 1930s, to take the general public’s mind off asking questions about “the beginning” and where the "center" was located. Eddington said in a book in 1933 that we are located "in the skin of the balloon", and that was baloney too.
|
OK if you want to get technical the "size" of the universe is defined by the scale factor R(t). As photons move through space towards us R(t) increases as does their wavelength. Hence the photons are redshifted. The fact is that the simplest hypersurfaces in GR have in centre on their surface. Asking where the centre is is like asking which city is at the centre of the earth. The fact is we are only able to preseve the dimensions we live in. A 1D ant living on the circumference of a circle would only know back and forward.