Total Solar Eclipse — August 12, 2026

The 12 August 2026 shadow track begins at sunrise over the Russian Arctic, sweeps south-southwest over the North Atlantic and eastern Greenland, crosses western and northern Iceland in mid-afternoon local time, races down the Atlantic for two hours, and finally makes landfall in northwestern Spain in the hour before sunset — passing over Galicia, Asturias, Cantabria, La Rioja, Navarra, Aragón, southern Catalonia, northern Valencia and the Balearic Islands before ending at sunset near Mallorca.

Two aspects of this path are unusual and worth planning around. First, the Sun is very low over Spain: from Bilbao it is only 5° above the horizon at totality; from Zaragoza, 3°; from Valencia, less than 2°. An eclipse this low is spectacular — the corona hangs against a colored sky — but it demands a wide-open western horizon. Second, Iceland offers the highest Sun (18–22°) on land, but the reliably variable summer weather makes a fixed viewing plan risky. Mobility on eclipse day, either by car or by boat, is the standard advice from experienced eclipse chasers.

The partial phase lasts about 75 minutes on each side of totality and is, honestly, unremarkable until roughly 15 minutes before second contact. Then the light changes. The temperature drops. Colours desaturate. Shadows on the ground sharpen unnaturally, because the light source has become a thin crescent. If there are trees, the gaps between their leaves cast hundreds of tiny crescents on the ground — one of the most photographable moments of the whole eclipse.

In the final seconds before totality, the last sliver of the Sun breaks into brilliant beads of light through valleys on the lunar limb — Baily's beads — then contracts to a single blazing point surrounded by the corona: the diamond ring. When the diamond disappears, the corona flares open, three-dimensional and structured, and the sky goes twilight-dark. Venus is easy to find; Jupiter, Mercury and Regulus may all appear within a fist's width of the eclipsed Sun.

Totality itself lasts, from most of Spain, between 55 and 105 seconds. Look around. The horizon glows 360° sunset-orange in every direction. Then, on the opposite limb, another diamond blazes — third contact — and you have less than a second to get your glasses back on.

The only safe way to look at a partially eclipsed Sun is through solar filters that meet the international standard ISO 12312-2. Certified eclipse glasses cost a few euros; a good solar filter for a telescope or camera costs €30–€150. Every reputable supplier — AAS-listed brands such as American Paper Optics, Baader Planetarium, Thousand Oaks Optical, Solar Eclipse International — prints the standard on the product.

What does not work: sunglasses (even stacked pairs), exposed film, CDs, smoked glass, polarising filters, neutral-density photographic filters, welding glass below shade 14, or "just glancing quickly". The Sun does not hurt to look at because there are no pain receptors on the retina — you damage your vision without noticing, and the damage is often permanent. Children in particular need supervised glasses that fit.

The only moment when the naked eye is safe is during totality itself, from inside the path of totality. When the last bead of Sun disappears, the corona is roughly as bright as a full Moon and completely safe. The instant the first bead reappears — that final "diamond" on the opposite limb — glasses must go back on.