Full-res file is about 12,5 Megapixels with a resolution of about 1 arcsec per pixel. It shows an area of sky large 1,0° x 0,8° (for comparison, the full-Moon has a diameter of about 0,5°).
The image is available for Museum, Planetariums, exhibitions, publishers and authors in very high-resolution. If interested in using the image, please read my policy or e-mail me with your request.

Copyright: Davide De Martin.

This color image is based on data coming from several photographic plates taken between 1987 and 1990 through the Palomar Observatory's 48-inch (1,2-meter) Samuel Oschin Telescope as a part of the second National Geographic Palomar Observatory Sky Survey (POSS II). The photographs were recorded on two type of glass photographic plates - one sensitive to red light and the other to blue and later they were digitized. Credit: Caltech, Palomar Observatory, Digitized Sky Survey.