walicki blog


Moon Atmosphere Outlined

If the Moon exhibits an edge outline it must be due to ‘Atmospheric Refraction’ causing ‘Light Dispersion’ along is edge in direct sunlight. This could be due to glass or silicon in the soil and particles in the ‘thin’ atmosphere.

Please watch my video
http://www.youtube.com/watch?v=kt6h02SHfdE

I have prepared a collection of comparative examples of what I consider a strange outline surrounding the waxing and full Sturgeon (or Red) Moon during July and August 2009. I specifically show: night glow, daylight, day humidity and haze, night soft-glow, twilight, full phase, juxtaposed and veiled outlines.

I understand light theory which states “All edges attract or reflect the most light.” I seek to understand why there is a contrasting ‘outline’ surrounding the Lunar body regardless of time of day or night, varying weather conditions or degree of reflected light particles.

My conclusion is that the ‘negligible’ Lunar atmosphere is observable to a degree depending on time/space parameters. I also believe that a waxing Moon is best observed between sunrise and noon and a waning Moon from sunset through twilight.. altho waxing has a slight advantage with less charged particles in the Earth’s atmosphere (early morning is cooler).

* “Refraction is slightly different for different colors of light. Dispersion is a property of all transparent materials. Only in special situations is the dispersion of air visible to the naked eye.”

Please read this about Atmospheric Refraction and Light Dispersion..
http://mintaka.sdsu.edu/GF/explain/optics/disp.html

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1 Comment so far
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Two likely causes are related to your equipment.

Any lens will produce the effect, and small lenses more than large. This is because the diameter of the lens is mathematically similar to a low-pass filter in audio, but the lens filters spatial information. An edge is a rapid change in intensity over a small (angular) distance. The small lens will try to smooth this, with the result that you see.

In the camera is a similar filter because of the MPEG encoder. When the image is compressed, the edges are smoothed in weird ways. This probably gives the “darker right at the edge” effect. If you are familiar with electrical overshoot, this is the same idea. In other words, when changing from dark (gray) to light, there could be slightly darker overshoot because of the MPEG mathematics.

Comment by TheTraveler




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