  In 2001 Lori M. Lubin and Allan Sandage, using big-bang cosmology for
interpreting the data, found the surface brightness of galaxies to be inversely
proportional to about the third power of (1+z), while the contemporary big-bang
cosmology predicts that the surface brightness is inversely proportional to the
fourth power of (1+z). In contrast, these surface brightness observations are
in agreement with the predictions of the plasma-redshift cosmology. Lubin and
Sandage (2001) and Barden et al. (2005), who surmised the big-bang expansion,
interpreted the observations to indicate that the diameters of galaxies are
inversely proportional to (1+z). In contrast, when assuming plasma-redshift
cosmology, the diameters of galaxies are observed to be constant independent of
redshift and any expansion. Lubin and Sandage (2001) and Barden et al. (2005),
when using big-bang cosmology, observed the average absolute magnitude of
galaxies to decrease with redshift; while in plasma redshift cosmology it is a
constant. Lubin and Sandage and Barden et al. suggested that a coherent
evolution could explain the discrepancy between the observed relations and
those predicted in the big-bang cosmology. We have failed to find support for
this explanation. We consider the observed relations between the redshift and
the surface-brightness, the galaxy diameter, and the absolute magnitude to be
robust confirmations of plasma-redshift cosmology.
