This total solar eclipse looked strangely golden — here’s why
A total solar eclipse in Spain appeared golden due to the Sun's low position on the horizon and the presence of wildfire smoke in the atmosphere. These conditions filtered out shorter blue light wavelengths, leaving behind warmer, golden tones.
Why it matters
This phenomenon illustrates how atmospheric conditions and light scattering can significantly alter the visual perception of astronomical events.
Last week's total solar eclipse offered more than a spectacular view. It also produced an unusual atmospheric effect that gave the Sun's outer atmosphere a striking golden appearance.
During a total solar eclipse, the Moon completely blocks the bright disk of the Sun, making the much fainter solar corona visible. The corona is the Sun's extremely hot outer atmosphere, and during most eclipses it appears white or silvery. Some people watching last week's eclipse did see this familiar pearly color. In Spain, however, observers were treated to something different. The corona took on an unusually rich golden hue.
The timing of the eclipse played an important role. In Spain, totality occurred while the setting Sun was already close to the horizon. When the Sun sits that low in the sky, its light must travel through much more of Earth's atmosphere before reaching an observer.
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