Water Vapor
A low light level camera inside the bell jar facility took this photograph during a test at Martian surface pressures and temperature. In the center is a small dewar of water being held at just above freezing. Water vapor from this pool quickly freezes on surrounding equipment. These features closely resemble what is seen in terrestrial Rodriguez wells, improving confidence in the experiment design.

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Photo by: Courtesy Photo |  VIRIN: 200805-A-A1403-011.JPG