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Birthday · April 25, 2026

The Persistence of Sunlight

April 25, 2026

The same gravity that holds galaxies together and keeps planets in their orbits also held you to the Earth on the day you were born.

The Persistence of Sunlight

A little universe, just for you

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APOD published April 25, 2026. Credit: Lorenzo Busilacchi. A publication-date match, not a photo taken on your date. Independent of NASA.

Behind the image

The Persistence of Sunlight

Original APOD · April 25, 2026

This seaside sunset offered a surreal experience, captured in a sea and skyscape from the west coast of Sardinia, Italy, planet Earth. The Daliesque scene is a composition of sequential exposures made with a camera and long telephoto lens. The Sun is not melting, though. Its shifting and fluid appearance as it nears the horizon is caused as refraction along the line of sight changes and creates distorted images or mirages of the reddened solar disk. The changes in atmospheric refraction correspond to atmospheric layers with sharply different temperatures and densities. Another famous but fleeting effect of atmospheric refraction produced by a long sight-line to the setting (or rising) Sun is often called the green flash.

Image credit: Lorenzo Busilacchi

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