Webb Society Deep-sky Observer's Handbook: Clusters of galaxies

16 inch Abell clusters amateur aperture apparent magnitude appears approximately E/W Atlas bright and brighter bright and slowly bright galaxies Bright oval brightest galaxies CALIFORNIA LIBRARY catalogue cD galaxy central region CGCG close north close NP cluster Abell cluster galaxies clusters of galaxies Coma cluster Comments Considerably faint contains core diameter diffuse disc galaxies distance distribution of galaxies elongated approximately example eyepiece faint star fainter Finder Chart galactic galaxy cluster GSW 16-inch halo identification intracluster medium irregularly round luminosity function middle MP field nebula NGC/IC north following object Perseus cluster photographic magnitude plate POSS protocluster radiation redshift reflector relatively rich clusters RNGC round nebula slightly brighter slightly elongated slowly brighter Small and round Spindle spiral galaxies star close stellar galaxy stellar nucleus superclusters surface brightness survey telescopes UNIVERSITY OF CALIFORNIA Virgo Cluster visible visual observation whilst X-ray Òóðå