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Image dupliquée de la lune à l'horizon
Paperback
ISBN13: 9781998321667
Publisher: Petra Books
Published: Aug 1 2025
Pages: 34
Weight: 0.07
Height: 0.09 Width: 4.00 Depth: 6.00
Language: French
Des observations ont été réalisées au-dessus d'un grand lac offrant une vue dégagée sur l'horizon lunaire, révélant des couchers de lune présentant une image dupliquée en dessous. Ce phénomène est connu sous le nom d'effet vase étrusque ou effet oméga, en raison de sa forme. L'origine de cette image inférieure est étudiée réfraction, réflexion ou gravitation.
Puisque ce phénomène n'est visible que depuis un point d'observation bas, au-dessus d'une surface plane et d'un horizon dégagé, il souligne l'importance de la position de l'observateur.
L'origine de l'image inférieure observée à l'horizon lors du lever et du coucher de la Lune et du Soleil est examinée. Un modèle de réfraction suggère que la lumière provenant de la Lune géométrique située au-delà de l'horizon traverse des couches d'air de températures et de densités différentes avant de se courber vers l'observateur. Cependant, ce modèle ne suffit pas à expliquer la persistance de cette image inférieure, qui n'a rien d'un mirage. L'auteur se demande si la réfraction, la réflexion ou la gravitation jouent un rôle dans son apparition.
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