SL4-141-4316 (20 Jan. 1974) --- An oblique view of ice formations in Canada's Hudson Bay, as photographed from the Skylab space station in Earth orbit by one of the Skylab 4 crewmen. The camera used was a hand-held 70mm Hasselblad, with SO-368 medium-speed Ektachrome film. The southwestern part of the bay is prominent with the Nelson River in Manitoba flowing into it. Skylab never flew this far north in latitude. However, its orbital vantage point allowed observations and photography while over a point some 600 miles away as in the case of this picture. The ice formation along the southwest portion of Hudson Bay can be studied from photographs such as this one. The buildup of ice along the windward shore (very white) followed by the clear water gap (dark) caused by the wind blowing the newly formed ice toward the opposite shore, and finally the patterns in the ice structure itself are studied to learn more of the nature of the "winterization" of this area. Photo credit: NASA