Overview: Along with the traditional optical window, many new windowshave been opened on galaxies in the last two decades, made possible bynewdevelopments in groundbased detectors and by space missions thatallow detection of photons that are otherwise absorbed by the Earth‘satmosphere. Galaxies can now be observed in the radio, submillimeter,IR, optical, UV, X- and gamma-ray bands, each window allowing us tolearn more about galactic components and properties. Thesedevelopments have also imposed the view that a deeper understandingof even normal galaxies requires a panchromatic approach, making
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