[Credit & Copyright: Tunç Tezel (TWAN)]
Simply amazing. Thanks.
An analemma is depicted in the Tom Hanks film, CASTAWAY. He draws one on the wall of a sort of cave, where the sun shadow forms a spot.
This was a counterfactual depiction, as note the statement in the article that the image, or record, in the CASTAWAY case, must be made at NOON, which means clocktime. If you took it at “solar noon” it would just mean marking it in a straight line.
Beautiful!
And I my hobby is rolling and welding “true” armillary spheres, accurate for the location of the sunrise, zenith and sunset for every day of the year for the latitude the sphere is located!