Spiral galaxies (old galaxies) are less common than elliptical galaxies (young galaxies). The greater quanitity of these young galaxies is not related to their color. This color represents the measure of emitted heat observed by an infrared camera. Therefore, it can be inferred that the temperature of a galaxy, as measured by its heat emission, is not determinate of its age, Furthermore, as age of galaxies correlates with quantity of galaxies, but not with temperature of galaxies, quantity of galaxies does not correlate with temperature of galaxies.