Love the shot. The sunlime shows southern summer at the time. Which mea a the carbon dioxide in the cap will be close to minimum, so this is the smallest (or nearly) extent that will be shown. The largest extent is actually hard to photograph through since it is in southern winter and would be in shadow.
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flickr doesn't seem to let me right-click on images to open them in a new tab, so i'll reupload it here:


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