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quote:Tired light mechanisms were first proposed in 1929 by Fritz Zwicky as an alternative explanation for the redshift-distance relationship. While the Big Bang and the Steady State cosmologies both proposed that the Hubble Law was associated with a metric expansion of space, tired-light cosmology was a proposal that photons slowly lose energy as they travel vast distances through a static universe (for example by an interaction between the photons and some sort of homogeneous and isotropic medium). Since a decrease in energy corresponds to an increase in light's wavelength, this effect would produce a redshift in spectral lines that increase proportionately with the distance of the source. The idea is still promulgated by a few proponents, but the vast majority of physicists and astronomers accept the conclusions of various studies that such an effect does not account for cosmological redshifts.The term "tired light" was coined by Richard Tolman in the early 1930s
quote:Originally posted by science_guySo light loses energy over time? If so, would light, traveling at our speed, quickly run out of energy, since it is no longer traveling at the speed of light, and therefore no longer having the benefit of relativity?
quote:Would there be any way to take advantage of that fact? Could it be that what we see of the universe is how far the light travels before it dies, and we would see different stars and galaxies if we went to a different galaxy?