I Understand Most Of This

If you had a stationary camera which was pointed it at the western sky and you took a picture every twelve days at 5:30 p.m., this is what the sun would look like in each of the photos. (This frequency and time is actually my best guess from looking at the photo, but I know the photo was taken at the exact time of day on several days throughout one year.) I knew the sun would be higher in the sky in summer and lower in the sky in winter but that figure eight kinda surprises me. (Source as found here.)