Digitized Sky Survey
The Digitized Sky Survey (DSS) is the digital version of a photographic survey of the entire sky. It is based on the photographic plates of the Palomar Observatory Sky Survey for the northern sky and the SERC / ESO survey for the southern sky . The DSS images are freely accessible in FITS and GIF format via various data centers on the web, but they are protected by copyright.
The first version of the DSS was published in 1994 on 102 CDs ( DSS First Generation , compression 1:10). In 1996, a second version ( DSS Second Generation ) with a higher resolution (1 arc second per pixel ) was started, which currently achieves coverage of around 98% in the red, 99% in the infrared and 45% in the blue spectral range.
Web links
Commons : Digitized Sky Survey - collection of images, videos and audio files
