(FILES) A man wears eclipse-viewing glasses that are certified with the ISO 12312-2:2015 international safety standard, which specifies requirements for the direct observation of the sun, in Burgos on July 2, 2026. Day will briefly turn into night across a swathe of northern Spain on August 12, when the Moon will completely cover the Sun during a rare total solar eclipse. Here is what you need to know about the total eclipse, which is the first visible in mainland Europe since 2006. (Photo by CESAR MANSO / AFP via Getty Images)