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    Re: An interesting question
    From: Frank Reed
    Date: 2013 Oct 13, 11:32 -0700

    "It may not be perfect but it sounds like we both think the Salt Flats to have appropriate topography for celestial.
    I'm still trying to answer Lu's student's question. Where on earth, aside from bodies of water, is the surface appropriate for celestial."

    Yes, I agree on salt flats. Frozen lakes can work the same way (if the surface is smooth enough --no compression ridges), but we have the same issue of contrast and questionable refraction. We already discussed lakes, so frozen lakes might not qualify as a separate category. :)

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