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Duplicate Image at Moonset

Duplicate Image at Moonset

Paperback

Astronomy & SpaceHistory & Philosophy of Science

ISBN13: 9798278014195
Publisher: Independently Published
Published: Jan 15 2026
Pages: 32
Weight: 0.09
Height: 0.07 Width: 5.00 Depth: 8.00
Language: English
Observations were made over a great lake with a clear view to the horizon of moonsets that displayed a duplicate image below. This is known as an Etruscan Vase or an Omega effect because of the shape. Three causes of the inferior image are considered: refraction, reflection, or gravitation.
Since the phenomenon is only seen from a low vantage point looking over a level surface to a clear horizon it underscores the importance of the observer's position.

Also from

Geldart, Peter D.

Also in

Astronomy & Space