Scientists study solar eclipse in northern Spain

A rare total solar eclipse will sweep across northern Spain this Sunday, August 12, marking the first time in 20 years that a total eclipse has been visible from mainland Europe. The moon’s shadow will completely block the sun for up to two minutes in areas such as Galicia, Asturias, and parts of Castilla y León, plunging midday skies into darkness.

Total solar eclipses offer scientists rare windows to study the sun’s outer atmosphere, known as the corona. This faint, wispy layer is usually drowned out by the sun’s glare but becomes visible when the moon blocks the solar disk. Researchers will use ground-based telescopes, high-altitude balloons, and even aircraft to capture high-resolution images and data on the corona’s temperature, magnetic fields, and solar wind. The event is especially significant because it comes during a period of heightened solar activity, offering a clearer view of eruptions and flares that can affect satellites and power grids on Earth.

The eclipse’s path will begin in the North Atlantic, cross over Greenland and Iceland, then move into Spain around 1:30 p.m. local time before heading east toward the Mediterranean. While totality will only last a few minutes in each location, scientists have planned a range of experiments. One team from the European Space Agency will deploy spectrographs to analyze the corona’s chemical composition, while another will study how the sudden drop in sunlight affects Earth’s upper atmosphere and radio communications. Amateur astronomers and citizen scientists will also contribute by recording changes in temperature, animal behavior, and cloud patterns.

For millions of spectators, the eclipse will be a breathtaking spectacle—but for researchers, it’s a critical opportunity. The next total solar eclipse visible from Europe won’t occur until 2026, and full coverage won’t return to Spain until 2061. That makes this weekend’s event not just a moment of wonder, but a rare chance to gather data that could improve space weather forecasts and deepen our understanding of the star that powers our solar system.