Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Narrow Swath of South America Sees Total Eclipse of the Sun VOA News A narrow 96-kilometer-wide corridor from the Pacific Coast in Chile across the Andes mountain range and into Argentina in South America was treated Monday to views of the final total solar eclipse of 2020. A total solar eclipse occurs when the moon passes between the Earth and the sun, casting a shadow that momentarily extinguishes daylight on Earth. .