Work

Perceived Daylight and Horizon Color on the Moon: Contrast, Exosphere, and Δf Geometry

Year: 2026

Type: article

Abstract: This note examines why lunar daytime would appear bright to human observers despite the absence of an atmosphere. Using contrast geometry, sensor limitations, regolith optics, and the Moon’s collisionless exosphere, the work explains why no true sky color forms while allowing a physically constrained, narrow-band horizon glow. The analysis remains consistent with mainstream optics and introduces testable predictions for upcoming lunar missions.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.18464027

Author: Sepehri, Sadegh

Language: English

Topic: Planetary Science and Exploration

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7127434603

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