Deep CCD Survey: Galaxy luminosity and color evolution.

CCD multi-color imaging of faint galaxies in 12 random high- latitude fields reveals strong evidence for color and luminosity evolution. Deep images in several bands from 0.36 to 1micron enable studies of galaxies undergoing evolution at redshifts up to 7 in a zero dust Universe. Fainter than 27th B sub J mag the sky becomes confusion limited in galaxies. Galaxy counts at 25th B sub J magnitude are a factor of 5-15 above no-evolution models. The differential number counts of galaxies Log N(m), are found to vary with magnitude as .3I to .45B sub J, ruling out a local origin of these faint galaxies. A strong bluing trend is seen for the fainter galaxies, suggesting that the UV excess from massive star formation in these evolving galaxies has been redshifted into the blue band. The extragalactic background light is computed explicitly from the number-magnitude counts.