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On Dec 26, 1:53 pm, Jim Logajan wrote:
wrote: BTW, our moon's albedo on average of 0.11 is nearly as physically dark as an open pit coal mine. So what? The albedo of a green golf course is 0.13. The albedo of a conifer forest is only about 0.083. You need to get out more. Go to a basalt flow on Earth - there are plenty. Or get outside and look up at the full moon some night. You're hanging your hat on the most feeblest of all threads. Speaking of coal mines, compare these photos: http://www.geokem.com/images/scans/I..._coal_mine.jpg http://www.geokem.com/images/scans/N...-Geologist.jpg with this one: http://astrogeology.usgs.gov/Project...SolarSystem/Jp... Those are certainly a couple of terrific coal mine pictures, with the floor or deck of that first one at roughly 0.1 or less, and the overcast albedo worth of the second at 0.12 or slightly better, and of the third one being of a certain guano island as having that nifty array of xenon arc lamps that's illuminating their foreground as though this local source of artificial illumination is situated nearby, with those nearly soft white and either extremely eroded and/ or dusty hills in the background. BTW; Can I use all three of those images in a court of law? And so all of that is why the NASA/Apollo moon wasn't ever the least bit dark or much less blue, and probably the same reason as to why Venus was always so darn invisible. Now we all know the Jim Logajan truth, and thanks ever so much. So what did you think of the piloting of Neil Armstrong? (Trying to make this topical! ;-)) That's easy: especially when there's no such fly-by-rocket lander to start with. - Brad Guth |
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