NASA Astronomy Picture of the Day Features an Anticrepuscular Rainbow Fan

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NASA's Astronomy Picture of the Day for October 20, 2026 showcases an anticrepuscular rainbow fan, an atmospheric optical phenomenon. The image was selected as part of NASA's daily series that features striking photographs of the cosmos and nearby natural sights. Each entry is accompanied by a brief explanation written by a professional astronomer. The featured item highlights how sunlight interacting with atmospheric conditions can produce fan-shaped rainbow patterns visible opposite the sun. Further details about the photograph's origin and location are available on NASA's APOD website.

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Human Activity Is Reshaping How Water Moves Across Earth's Continents

Human activities have become closely linked to the way water is distributed across the continents. A newly published study examines these effects in greater detail. The research sheds clearer light on the extent of human influence on the planet's water cycle. The source article provides limited specifics, so the study's exact methods and quantified findings are not detailed here. The report is attributed to NASA.

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NASA Glenn Researchers Build Software to Predict Aircraft Engine Noise

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