NGC 6522 and NGC 6528 (Through Baade's Window) Space Recent Nebulae Galaxies Star Clusters Solar System Other Facilities Nature People Programs SkyNights DiscoveryDays SkyCamp (Click the image above for the largest available version.) NGC 6522 and NGC 6528 (Through Baade's Window) Picture Details: Optics             24-inch RC Optical Systems Telescope Camera           SBIG STL11000 CCD Camera Filters              Custom Scientific Dates               June 1st 2008 Location          Mount Lemmon SkyCenter Exposure          RGB = 30:20:30 minutes Acquisition       TheSky (Software Bisque), Maxim DL/CCD (Cyanogen) Processing        CCDStack (CCDWare), Mira (MiraMetrics), Maxim DL (Cyanogen), Photoshop CS3 (Adobe) Credit Line and Copyright        Adam Block/Don McCrady/Mount Lemmon SkyCenter/University of Arizona