Do you see any "spirality" in this picture?

  • Thread starter Thread starter Swamp Thing
  • Start date Start date
  • Tags Tags
    Picture
Join the discussion
Registration is free. Start your own thread to ask a follow-up.
6 replies · 2K views · last reply
Swamp Thing
Insights Author
Messages
1,079
Reaction score
849
When I look at this picture, the craters seem to have a slight tendency to form rough spirals. (I won't say if they seem to be clockwise or anticlockwise, because I'd like to know what you think -- and I don't want to bias you).

So if you feel there is any spirally stuff going on at all, please reply saying if it is clockwise or anticlockwise going out from the center.

Circular grayscale view of the lunar surface, with a dense field of impact craters of many sizes around a large central crater complex.
 
Physics news on Phys.org
Starting from the center. move outward and to the right.

Black stylized spiral graphic on a white background, with curved strokes swirling clockwise inward toward a dark central core.


If you place a little vector at the center of each crater with the head of the vector pointing towards the sun lite side of the crater rim the vectors tend to point clockwise. I don't know if that throws off my judgment. I guess there is a mathematical way to analyze the photo to determine any chirality?
 
  • Like
Likes   Reactions: russ_watters
I see no spiral. However, I detect an image of the Virgin Mary...

Zz.
 
  • Haha
  • Like
Likes   Reactions: DennisN, rsk, gmax137 and 2 others
Sometimes it is CW, sometimes CCW. Looks like one of these small tricks our minds play with us.
 
  • Like
Likes   Reactions: BillTre
No. This is a composite photo. You're seeing an artifact of processing.

Different sections of the body are taken at different times - to optimize lighting and contrast - and then stitched together digitally.

Look at the shadows of individual craters. They come from all directions:

Circular grayscale view of a cratered lunar surface with a large central crater complex, three yellow arrows marking features near its rim.


The "spirality" you're seeing is simply because all shadows are arcing outward.
 
  • Like
Likes   Reactions: russ_watters, rsk, Swamp Thing and 5 others
Two circular grey lunar-style crater images side by side with red marks showing shadow directions; left labelled "Composite photo all shadows are concentric", right labelled "What it would look like if taken in one shot with single source of illumination".
 
Attachments
  • Two side-by-side views of a grey, cratered lunar-style surface with red line segments marking shadows; left labelled "Composite photo all shadows are concentric", right labelled "What it would look like if taken in one shot with one angle of illumination".
    1595442158468.png
    47.5 KB · Views: 201
  • Like
Likes   Reactions: russ_watters, rsk, Swamp Thing and 1 other person
I see this from top down view.
 
  • Like
Likes   Reactions: Swamp Thing and DaveC426913