Observing the sun slowly disappearing behind the horizon is a particularly pleasant experience if you are in the bosom of nature, away from the city buildings. If, in addition, the horizon line is marked by a water surface in which the last rays of the day reflect, we are dealing with a beautiful spectacle of nature. This phenomenon has inspired artists for centuries, perpetuating the solar halo on countless images and photographs, in which we may admire the sun surrounded by a colorful glow, majestically disappearing beyond the horizon.