thyerje astronomike

thyerje astronomike

The change in direction of travel (bending) of a light ray as it passes obliquely through the atmosphere. As a result of refraction, the observed altitude of a celestial object is greater than its geometric altitude. The amount of refraction depends on the altitude of the object and on atmospheric conditions.

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Secteur d’activité/Domaine : Astronomie
Catégorie : l'astronomie générale
Company: Caltech
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