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Post by lukepemberton on Jan 1, 2011 16:39:33 GMT -4
Somewhere on the web, there is a page on why taking the average albedo of the moon is not a 'scientifically accurate way' of talking about the illumination from the surface, and hence undermines the hoax claims about fill in lighting etc. If I recall it goes in detail about the soil properties.
I have looked all over Clavius. I'm sure Jay talks about it. Does anyone know the link, or point in the right direction of a similar discussion. I'm sure the link was posted here.
Many thanks in advance.
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Post by lukepemberton on Jan 1, 2011 18:51:08 GMT -4
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Post by ka9q on Jan 4, 2011 12:32:44 GMT -4
That's an excellent article! I finally understand all the different forms of albedo.
It mentions that the moon's limb provides the brightest reflection. It occurs to me that's helpful in explaining why the "fill light" is so bright in the pictures of Aldrin coming down the ladder. The sun was at a very low elevation in the east, so the area west of the LM scattered it back to the east -- and into the shaded side of the LM -- especially strongly.
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Post by lukepemberton on Jan 4, 2011 14:16:13 GMT -4
It mentions that the moon's limb provides the brightest reflection. It occurs to me that's helpful in explaining why the "fill light" is so bright in the pictures of Aldrin coming down the ladder. The sun was at a very low elevation in the east, so the area west of the LM scattered it back to the east -- and into the shaded side of the LM -- especially strongly. That's what occurred to me. A few people explained it in comments in YouTube videos, but given the 500 character limit I did not quite understand the point that was being made. Phil Webb made a nice analogy. If you look at Jay's analysis of Man on the Moon (In his photogrpahy section on Clavius), you can begin to see how the regolith properties will appear differently when photographed sun up and sun down. Putting a plastic LM on tarmac just does not cut it as a simulation. Tarmac is simply not the same as lunar regolith.
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