johnnydeep wrote: ↑
Mon Aug 24, 2020 2:45 pm
JohnD wrote: ↑
Mon Aug 24, 2020 9:44 am
The blurb refers to the "da Vinci glow", and gives links to da Vinci, and to previous APODs that show the glow, but nothing to da Vinci's original - geniusly original, for the time, even if erronius! - explanation. It's in the Codex Leicester, a collection of his papers on astronomical and other subjects, that is now owned by Bill Gates, who bought it for $30 MILLION nearly thirty years ago.
da Vinci suggests that as the Earth is covered with water, which reflect sunlight, so must the Moon, whose oceans reflect back the reflected sunlight. It's on a page entitled " "Of the Moon: No Solid Body is Lighter than Air."
See: https://www.aps.org/publications/apsnew ... istory.cfm
So, are you saying that da Vinci was right about the "sunlight reflected first by the Earth to the Moon, and then back from the Moon to the Earth" but wrong about what was doing the reflecting?
It's not just me who thinks he was right. If many, many others did not feel that da Vinci was perfectly correct in his theory of the reason for Moonglow, the phenomenon would not be given his name, would it? He should be forgiven for supposing that the Moon had many seas, whose water reflected the light. There were no telescopes until a century after his time, and Lunar mapping not until two hundred years later, but still the flat areas were named "Mare", seas. Now that we can see the Far Side of the Moon, it has no such flat areas, so we have not perpetuated that mistake in naming Far Side Features, but we have persisted on Mars with the Maris Erythraeum, Sirenum, Cimmerium etc.
My post was to correct an omission (in my view) in the original blurb, that didn't provide a link to da Vinci's original words and diagrams. I would have posted an image of the relevant page, but unlike the inestimable Anne and neufer, I cannot work how to post pictures here.