Protect your eyes while enjoying the spectacle of a total solar eclipse - CNN

A total solar eclipse will be visible on August 12 across parts of Greenland, Iceland, northern Russia, Spain and Portugal, marking the first of three eclipses expected over Spain within the next two years.
Because the eclipse occurs in the evening over Spain, viewers there will witness a rare sunset eclipse, seeing a crescent sun setting after totality.
A total solar eclipse happens when the moon passes between Earth and the sun, fully blocking its face; those within the path of totality see the full eclipse, while those outside see only a partial one.
A partial solar eclipse will be visible across the northern United States, Canada, much of Europe and northwestern Africa, with timing available through resources like Time and Date.
Eye protection such as certified eclipse glasses is essential, since ordinary sunglasses are not sufficient; NASA states the only safe moment to view without protection is during totality itself.
Even 1% of the sun's visible surface emits enough radiation to permanently damage light-sensitive eye cells, according to the Institute of Astrophysics of the Canary Islands, and can cause solar retinopathy—an untreatable, permanent condition, as one woman experienced after the 2017 eclipse using improper glasses.