On October 20, 2026, the Astronomy Picture of the Day (APOD) showcased an anticrepuscular rainbow captured in the mountains near Flagstaff, Arizona. The stunning display was observed at approximately 19:38 Mountain Time and presented as a vibrant arc of color stretching across the sky. This particular phenomenon occurs when sunlight passes through water droplets suspended in the air, creating a spectrum of light visible during twilight conditions. The photograph highlights the beauty and complexity found within atmospheric optics, offering a unique visual experience for observers. Astronomers frequently utilize APOD to share discoveries and educate the public about astronomical events and phenomena.
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This PlaneNews briefing summarizes reporting originally published by www.nasa.gov.
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