Hawkstein, the redshift used to explain the expanding universe depends upon the interpretation from the principle of equivalence. Do you have a specific particle experiment from labs studies that shows 3D space is expanding, and at what rate? Example, something by shooting particles around near c.Redshift measurements, among others, and it's not just expanding, it's accelerating. Better question is why... currently we have no f-ing idea. My money is on something like anti-gravity or repulsive gravity.
A good read here but there are some important caveats too. "Theoretical cosmologists developing models of the universe have drawn upon a small number of reasonable assumptions in their work. These workings have led to models in which the metric expansion of space is a likely feature of the universe.", also we have "More direct results of the expansion, such as change of redshift, distance, flux, angular position and the angular size of astronomical objects, have not been detected yet due to smallness of these effects. Change of the redshift or the flux could be observed by Square Kilometre Array or Extremely Large Telescope in the mid-2030s."
This appears to be so. Animals may abstract, but their abstractions are germane only to their day-to-day existence. Hunans, however, do so about things that don't even exist.the uniquely human ability to move to higher and higher levels of abstraction without limit. Animals may have multiple levels of abstraction, but their abstractions must stop at some finite upper limit; this is not so for humans: "
Hi rod, I can't understand the connection between the principle of equivalence and redshift, can you explain a bit more, please.Trying to find out if there is experimental verification of photons red-shifting as 3D space expands other than the interpretation based upon the principle of equivalence from GR, used since the 1930s or so based upon redshifts in galaxies based upon Edwin Hubble et al. Is there measurements showing New Horizons transmissions, redshift on their way to Earth? Is there particle accelerator experiments in labs that show photons redshift as they move along in the lab? Hawkstein said "Redshift measurements, among others..." The redshift interpretation is principle of equivalence, not direct, experimental verification, e.g. *others*.
Hi Cat, in my post above, rather than post 7, I should have used a quote from rod in post 5, as below:Hi David
Whilst waiting for Rod to reappear, you will find a vast amount if you search:
Principle of equivalence red shift.
On another matter, what is your view on objects appearing to remain the same size whilst the Universe is expanding? If everything expanded equally we would notice nothing and so not know the Universe was expanding. If our measuring rods expanded equally with the Universe then they could not measure the expansion. Problem?