On the evening of August 12, 2026, millions of people across Europe stepped outside to witness a rare and spectacular celestial event: a total solar eclipse. This awe-inspiring phenomenon, where the moon completely obscures the sun, created a dramatic spectacle as it traversed the skies over Greenland, Iceland, and Spain. The eclipse also cast a partial shadow over much of western Europe, including the UK, France, Belgium, Switzerland, and northern Italy.
The eclipse began its journey over the Arctic Ocean moving eastward to Greenland and Iceland before making its way to the Atlantic Ocean. The path of totality then continued to Portugal and northern Spain, where viewers were treated to a breathtaking display as the moon passed directly between the Earth and the sun. This alignment created a narrow band of totality, where the sun’s light was entirely blocked by the moon, revealing the sun’s corona a faint outer atmosphere usually invisible to the naked eye.
The Science Behind the Eclipse
A total solar eclipse occurs when the moon aligns precisely with the sun, casting a shadow on the Earth. This alignment is a rare event due to the moon’s slightly tilted orbit, which means it doesn’t cross the sun’s disc from our perspective every time it orbits the Earth. “The moon and sun have to line up precisely for the moon to fully cover the sun and for you to see a total eclipse,” explained Dr. Megan Argo, a reader in astrophysics at the University of Lancashire and vice-president of the Society for Popular Astronomy.
For viewers in Spain, the eclipse reached its peak between 20.26 and 20.33 local time just before sunset. In the UK, the partial eclipse began at 18.17 BST in London, reaching its maximum at 19.13 BST before ending at 20.06 BST. The percentage of the sun eclipsed by the moon varied across the UK, with Cornwall experiencing about 96% coverage, western Scotland around 93%, and London approximately 92%. “You have to be right in the middle of the shadow to see a total eclipse, and that is quite a narrow track on the Earth’s surface,” Argo noted.
Safety Tips for Viewing the Eclipse
While the total phase of a solar eclipse, known as totality is safe to view with the naked eye, it is crucial to protect your eyes during all other phases. Looking directly at the sun without proper protection can cause permanent eye damage. Special-purpose solar filters, such as eclipse glasses are essential for safe viewing. “If you don’t have eclipse glasses, you can use a colander or something to create a pinhole projector” suggested Dr. Carys Herbert, an astronomer at the Royal Observatory Greenwich. This method allows you to see the eclipse indirectly by projecting the light onto card or paper.
During the solar eclipse, former US President Donald Trump was widely criticized for looking at the sun without protective glasses. This incident highlighted the importance of following safety guidelines to prevent eye damage. Experts emphasize that homemade filters or ordinary sunglasses, even very dark ones, are not safe for viewing the sun.
The Significance of the Eclipse for Scientists
Solar eclipses offer unique opportunities for scientists to study the sun’s outer atmosphere, or corona. The corona is usually too faint to see unless the glaring light of the sun is blocked by the moon. “There are scientific things that we can do during eclipses,” said Argo. “It can tell us a lot about the chemistry of the sun’s atmosphere, how the atmosphere varies depending on the sunspot cycle and the solar activity cycle, which goes through an 11-year cycle.”
Historically, solar eclipses have played a crucial role in scientific discoveries. In 1919, expeditions were sent to measure the position of planets and stars close to the sun during an eclipse to confirm Einstein’s theory of general relativity. Today, scientists continue to use eclipses to refine their understanding of the sun’s corona and its interaction with the Earth.
The August 2026 solar eclipse was a rare and exciting event for both amateur stargazers and professional astronomers. As the next total solar eclipse visible in the UK is not due until 2090, this event provided a unique opportunity for millions to witness the beauty and wonder of our solar system in action.
