Comments on tired-light mechanisms

The author outlines the observational evidence which the tired-light theories must confront in order to become useful theories. It is shown that if the intervening medium is excluded as the agency for causing excess redshifts, then it is only possible that the intrinsic nature of the object itself could cause the excess redshift. The author has suggested that one parameter, the age of the matter making up the galaxy or quasar, is directly responsible for the redshift observed (with theoretical justification by appeal to the Hoyle/Narlikar theory, which states that masses of all particles can be a function of time). If that were true observationally, it would be expected that the younger the object, the greater the excess redshift (all parts of the object: gas, stars, etc.).<>