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grobi@[email protected]
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"A Fan-tastic Sign From Heaven"

October 20, 2026

An Anticrepuscular Rainbow Fan
* Credit & Copyright: Aurelia Degli Esposti

Explanation:
This is an unusual rainbow. For one thing, the rainbow is not complete, appearing only in a sunlit fan -- but that by itself is not very unusual. What is most unusual is the fake location of the Sun. The Sun appears to be toward the front, just below those hills -- but it is not. That is not how rainbows work. Rainbows involve a backward reflection from falling rain, so that the Sun must really be behind you. In this case, gaps between clouds near the setting Sun allowed rays to cross the entire sky and appear to converge in front, an unusual phenomenon called anticrepuscular rays. The photo was taken with a phone last week at sunset in Presenzano, Italy. The seemingly reverse rainbow was noticed when hanging up laundry.

https://science.nasa.gov/image-article/apod-2026-october-20-an-anticrepuscular-rainbow-fan/

#space #earth #rainbow #anticrepuscular #sun #astrophotography #photography #NASA #science #physics #nature #apod

October 20, 2026 Hills are seen in the distance below a partly cloudy sky. A group of orange rays appears to eminate from one area behind the hills. Across this fan of rays, near the top of the image, a short rainbow can be seen An Anticrepuscular Rainbow Fan * Credit & Copyright: Aurelia Degli Esposti Explanation: This is an unusual rainbow. For one thing, the rainbow is not complete, appearing only in a sunlit fan -- but that by itself is not very unusual. What is most unusual is the fake
NASA ScienceAPOD: 2026 October 20 - An Anticrepuscular Rainbow Fan - NASA Science
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Bob 🇨🇦🇲🇽🇺🇦@[email protected]

Honey bee hives have ‘living immune systems’ which defend against disease

https://theconversation.com/honey-bee-hives-have-living-immune-systems-which-defend-against-disease-289604

#science #biology #nature #bees

The ConversationHoney bee hives have ‘living immune systems’ which defend against diseaseHealthy honey bee colonies are remarkably good at keeping harmful microbes under control. A new study shows how they do it.
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