Wassily Kandinsky, a pioneer of abstraction, is best-known for distinctive paintings that feature geometric shapes and dramatic colors. His works would appear to be very unlikely candidates for astronomical dating. However, early in his career, Kandinsky produced the naturalistic canvas Binz on Rügen, Twilight, depicting a crescent moon in the sky above a beach resort on the Baltic Sea. Can we use the artist’s letters, an exhibition poster, astronomical calculations, and topographic clues obtained during a site visit, to determine Kandinsky’s precise position on the beach and the year and date of this scene? And what is the mysterious red object in the sky? The photographer Ansel Adams, famed for his images of the granite peaks in the High Sierra, included a waning gibbous Moon in the sky of his High Country Crags and Moon. He captured a waning crescent Moon in his Dawn, Mount Whitney. Can we use detailed topographic maps, site visits, and astronomical analysis to determine precise locations, dates, and times for these dramatic photographs?