The survey was originally meant to cover the sky from the north celestial pole to -24° declination. This allowed the color of celestial objects to be recorded. Each region of the sky was photographed twice, once using a red sensitive Kodak 103a-E plate, and once with a blue sensitive Kodak 103a-O plate. The survey utilized 14-inch square photographic plates, covering about 6 ° of sky per side (approximately 36 square degrees per plate). 99% of the plates were taken by June 20, 1956, but the final 1% was not completed until December 10, 1958. The first photographic plate was exposed on November 11, 1949. Humason, Walter Baade, Ira Sprague Bowen and Rudolph Minkowski. Among the primary minds behind the project were Edwin Hubble, Milton L. The photographs were taken with the 48-inch Samuel Oschin telescope at Palomar Observatory, and the astronomical survey was funded by a grant from the National Geographic Society to the California Institute of Technology. It was conducted at Palomar Observatory, California, United States, and completed by the end of 1958. Take a particular attention to the safety instructions written in the user guide.The National Geographic Society – Palomar Observatory Sky Survey ( NGS-POSS, or just POSS, also POSS I) was a major astronomical survey, that took almost 2,000 photographic plates of the night sky. Please, use only the batteries that are recommended. The batteries are not included in the delivery.
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