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There is this book called The Old Moon and the New by Valdemar Axel Firsoff (Sidgwick & Jackson, London, 1969). In this book, Firsoff ask'd the question if our eyes are much more color-sensitive during bright daylight/sunlit circumstances, because during dark nocturnal circumstances our eyes "lose" the ability to see vivid colors. When we look through the telescope at the bright Full Moon, we want to observe through an additional dark grey filter, to avoid the blinding brightness of the moon's powerful retro-reflection from its sunlit regolith layer (what I call Dry Heiligenschein). This optical effect ("Dry Heiligenschein") is also called Shadow Hiding. Now, what would happen if we don't look through a dark grey filter and let our observing eye receive 100 % of the Full Moon's bright (retro-reflected) light, while the (white painted) interior of the telescope's dome is illuminated by very powerful white artificial lightsources, to create daylight/sunlit circumstances? Thus: first we let both of our eyes "adapt" to bright artificial daylight or "pseudo" sunlight. Let's say, half an hour in pseudo-sunlight and then... looking through the telescope at the bright Full Moon (sans filter of course). Perhaps... the subtle colors of the moon would become much more visible... By the way, only a very small percentage of the world's population knows about the impossibility to see the Full Moon during the day. When the sun is shining through a dense (yet translucent) layer of Altostratus, most people think it's the Full Moon! Also interesting to observe: the rare light-bluish / light-greenish coloration of the diffuse looking disc of the sun shining through Altostratus. I don't think there's an explanation for this optical effect. The phase of the moon, such as the Full Moon, is a rather difficult subject to comprehend. When there's a partial lunar eclipse, most people think it's the Waxing or Waning Crescent Moon. When there's a Waxing or Waning Crescent Moon, most people think it's... (...or much more troublesome: many grown-up people still think it's a cut-out drawing of a banana shaped "smiling moon", hung up at the "ceiling" of the starry sky) (the Flemish "Janneke Maan" syndrome) (translated: "Little Johnny Moon"). But... wait a minute... there IS INDEED a possibility to see the Full Moon during, for example, noon. When there's a Total Solar Eclipse! The moon's near side is illuminated by the Full Earth. We on Earth see the retro-reflection from the moon's earthlit regolith layer (the so-called Ashen Light). |
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| I wonder what agi would have to say about this ¯\_(ツ)_/¯ |
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| Qué? |
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Sean Mc: I don't know who "agi" is, but I have to say this: "aghee" was one of the first words I said when I was a baby. Even up to now I still don't know what I actually meant... ¯\_(ツ)_/¯ |
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Danny Caes: I know about that; I think it's called earthshine? Imagine an image that includes moonshine, earthshine, and the sun, and the stars altogether? That would be a difficult project. And BTW, I recommend CloudyNights for writing visual threads. |
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| Artificial General Intelligence |
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To messierman3000, CloudyNights... mmmmm... O.K., I'll see what I can do. Perhaps this summer... Earthshine (or Ashen Light), as it is observed during real New Moon (a Total Solar Eclipse), could be a bit brighter than usual because of the optical phenomenon Glory in Earth's clouds. Seen from the moon, the moon's small diffuse shadow on the disc of the Full Earth is surrounded by the spectral colored "circles" of the Glory. The Glory is frequenly noticeable in Earth's clouds, captured by the daily transmitting color camera which is attached on the orbiting International Space Station (I.S.S.). |
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| Ashen LIghts as a term shall not be applied to Earthshine as seen on the Moon as the Moon has no atmosphere worthy of the name, to name but one reason. This term can only rightfully be applied to Venus. And I never observed Earthshine during totality. And yes, I'll agree with messierman3000, there are better forums than this for what you're interested in. |
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I thought: "Anything Goes" (off topic subjects), but... you're right, I have to search a more suitable forum (CloudyNights perhaps, as messierman3000 recommended in the other reply). The urge to write is too powerful, I have to find another way. |
