For the first time in more than a century, a total solar eclipse is coming to mainland Spain with an even longer encore next summer. Daytime darkness will descend Aug. 12 across the Iberian Peninsula, plus slivers of Greenland and Iceland. Totality will last up to two minutes and 18 seconds. A partial eclipse will delight as far away as Alaska and Siberia, enveloping Canada, the northern U.S., and much of Europe and West Africa. This year’s solar spectacle is a warmup to 2027 when a 6½-minute extravaganza will sweep from Spain to North Africa and the Middle East.