A total solar eclipse will cross Spain, Iceland and Greenland on Aug. 12, 2026, marking the first time in more than a century that mainland Spain experiences one. Skywatchers in the path of totality will have a chance to see the solar corona, the sun's outer atmosphere, which is usually hidden by bright sunlight. According to experts, the corona is the ultimate sight during a total eclipse, but there will be many other celestial features to observe. The 2026 eclipse will be followed by an even longer total eclipse next summer, offering another chance for viewers to witness the phenomenon.