National Geographic Society – Palomar Observatory Sky Survey
ASTRONOMICAL SURVEY, THAT TOOK ALMOST 2,000 PHOTOGRAPHIC PLATES OF THE NIGHT SKY
Palomar sky survey; Palomar optical sky survey; Palomar observatory sky survey; Palomar Observatory Sky Survey; Palomar Sky Survey; Palomar Star Survey; National Geographic Society - Palomar Observatory Sky Survey; NGS-POSS
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. It was conducted at Palomar Observatory, California, United States, and completed by the end of 1958.