A total solar eclipse crossed Spain and much of Europe on Wednesday [2, 3, 5].
This celestial event is significant because it marks the first total solar eclipse visible in Europe in decades [5]. For millions of observers, the event provides a rare opportunity to witness the sun's corona, but it carries severe risks for those who view it without proper equipment.
Approximately one million people across Europe observed the eclipse [1]. While the event is a spectacle, ophthalmologists said that looking directly at the sun during the partial phases can cause permanent ocular damage [2, 3].
Safety depends entirely on the phase of the eclipse. During the phase of totality, the moon completely covers the solar disk, blocking the photosphere [2, 3]. This blockage eliminates the ultraviolet and infrared radiation that typically damages the retina, making it the only time it is safe to look at the sun without protection [2, 3].
Outside of that brief window, specialized eclipse glasses are required. Experts said that direct exposure during the partial phases can lead to irreversible vision loss [2, 3].
This event is part of a rare cluster of activity for the region. Reports indicate there will be two total eclipses, and one annular eclipse, across the Iberian Peninsula between 2026 and 2028 [2].
While European observers focused on the current event, other regions are preparing for future occurrences. Some reports indicate that Mexico will experience a total eclipse in two years [1].
“It is safe to look at the sun only during the phase of totality.”
The 2026 eclipse highlights the intersection of rare astronomical alignments and public health risks. Because total eclipses are infrequent in specific geographic regions, public adherence to safety protocols during the partial phases is critical to prevent a spike in retinal injuries. The projected frequency of eclipses in the Iberian Peninsula through 2028 suggests a period of increased astronomical tourism and scientific study for the region.
