Photograph Library and Archives Canada Library and Archives Canada/National Film Board fonds/e011176946, Accession no.: 1971-271 NPC, Item ID number: 4949509, Reference: Box number: 78, Item no. (creator): 87633
Photograph taken in Ottawa, Ontario. NFB Photo Story: Space Clock for Space Age.
Title based on the following caption from the NFB Photo Story: The moon camera is designed to hold the moon fixed against a background of stars for a 10- to 20-second exposure. A circular filter intercepts the image of the moon reducing its brightness one thousand times. At the same time the filter tilts at a uniform speed causing the image of the moon to be displaced backwards the exact amount of its forward motion through the stars. In the photograph above each star is identified with its special catalogue number. The stars have been accentuated for the purpose of reproduction.
