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Hello, I'm interested in the opinions of Mars researchers concerning following: If there is little dust in the Mars atmosphere, the near-horizon martian (northern hemisphere) sky during early spring seems to look jasmine (yellow with a little orange). The color appears to change to gridelin (dark violet grey) as the distance above the horizon increases, becoming darker as the view moves toward the zenith of the martian sky. As spring turns to summer some photographs give the impression that the jasmine color becomes less prevalent, now the jasmine to gridelin color change looks like it occurs much nearer the horizon. During the autumn season (northern hemisphere) the situation seems to reverse. Now, jasmine is the main color, and an observer would have to look much higher above the horizon to see where the sky changes to a gridelin color. When there is a lot of dust in the atmosphere. The jasmine color appears to be replaced (in the instances described above"”although this would be most common in northern hemisphere winter and spring) with a salmon color (pink with much orange). Darker salmon colors would probably imply more dust in martian atmosphere. Any comments about the previous will be very helpful, but there is something else I am very interested in: What would a person see around noon if she were standing on the martian equator looking upward toward the sun? In this respect would the high martian sky look something like the sky of the Earth's Moon but, perhaps, dark gridelin instead of black (with more diffusion of rays visible around the sun), and would this be the case for any season on Mars? I found several pictures from Curiosity that looked like they were of the sun in the high martian atmosphere, but I couldn't find any description of the pictures, and I don't think any of the photos had been "rendered" to "natural" color. See following links as examples: http://an.rsl.wustl.edu/msl/mslbrowser/sqlImageHandler.ashx?id=NLA_413025507EDR_M0060000NCAM00505M1 http://an.rsl.wustl.edu/msl/mslbrowser/sqlImageHandler.ashx?id=0169ML0009080030104676C00_DRCL The second image seems to indicate that stars are visible in the high martian sky during daylight (perhaps I should say "sol-light") hours"”is this the case? Cordially, Leslie Charles