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Galaxies' SEDs (spectral energy distributions) can be assembled through spectrography, or constructed from the photometry of multiple surveys. There are many galaxies for which twenty or more passbands have been collected from various surveys, and through processing, an approximation of such a galaxy's SED can be determined. These can be useful for statistical studies of the SED of large numbers of galaxies. Also, efforts are made to model the SED of galaxies to determine the likely contributors, i.e., the stellar demographics, contributions of any active galactic nucleus, etc.