Yes. That is the issue and the point Smith may be conveying.

But, this is so well known, that I am surprised the article states that his paper is the first time anyone has presented the full picture. The response characteristics of the eye and the spectral irradiance of the sky, and the reason for it, have been known for a long time. If Smith's work is the first, we have been long overdue considering how much was already known. I did a Goo1 (level 1 Google search) and could not find a paper that incorporates all of this. Perhaps the originality claim is correct. I still doubt it.

About two years ago, or so, I read a related magazine article written by an astronomer who explained how the eye works and claimed the sun was really a green star. I was highly intrigued. Then came the BA's book, and I've been stuck chasing the sun's color ever since. I thought the article discussed the blue sky, too. If so, his work would have preceeded Smith's.

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.