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Astronomy and spaceflightMon 2 Nov 2026 · 13 of 13

NASA APOD Highlights Moon’s Varied Colors

Partly verified · 5/6 supported1 cited · 1 min read

nasa.gov reports that outside Earth’s atmosphere the Moon appears as a brown‑tinged gray when illuminated by reflected sunlight . nasa.gov reports that a red‑ or yellow‑colored Moon usually indicates it is seen near the horizon, where blue light is scattered away by a long atmospheric path . nasa.gov reports that a blue‑colored Moon is rare and can indicate an atmosphere carrying larger dust particles . nasa.gov reports that the cause of a purple Moon is unclear, possibly a combination of several atmospheric effects . nasa.gov reports that the featured image includes the total lunar eclipse of July 2018, during which the Moon appeared a faint red due to Earth’s shadow .

Why it matters. These color cues allow observers to infer atmospheric conditions such as horizon proximity or dust content .

Earlier on Astronomy and spaceflight

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