File:Potw1539a.jpg

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English: On the morning of Monday 28 September 2015 a spectacular total lunar eclipse was witnessed across Africa, the Americas, Europe and the Middle East. In Germany, it was photographed by Mahdi Zamani above the ESO Headquarters Extension and Technical Building. In this time-lapse sequence the Moon was visible between thin layers of cloud. It appeared bright to the upper-left and faded dramatically as it entered the Earth’s shadow and moved lower in the early morning sky.

A lunar eclipse takes place when the Moon, Earth and Sun are exactly aligned. When the Moon passes through the shadow cast by the Earth, our planet blocks the path of direct sunlight to the lunar surface and a total eclipse occurs. This event can only happen on the night of a full Moon.

This morning's total lunar eclipse took place during a supermoon — a full Moon which occurs at the same time that the Moon is closest to Earth in its elliptical orbit. The combination of the eclipsed Moon being both full and relatively close to the Earth made it look significantly bigger and brighter than usual.

Unlike solar eclipses, the Moon doesn't completely disappear from sight during a total lunar eclipse. Instead it often appears red, giving it the ominous nickname of "blood Moon". The reddish colour is caused by refracted sunlight that has passed through the Earth's atmosphere. Furthermore, most of the blue light is scattered away — the same effect that gives the Sun a red colour at sunset and sunrise.
Français : Eclipse lunaire totale au-dessus du quartier général d’ESO.

Le matin du lundi 28 septembre 2015, une spectaculaire éclipse totale de Lune a été observée en Afrique, Amérique, Europe et dans le Moyen Orient. En Allemagne, elle a été photographiée par Mahdi Zamani au-dessus du quartier général d’ESO.

Une éclipse lunaire totale a lieu quand la Lune, la Terre et le Soleil sont exactement alignés. Quand la Lune passe à travers l’ombre de la Terre, notre planète bloque la lumière solaire directe vers la superficie lunaire et une éclipse lunaire totale se produit. Cet événement n’arrive seulement que lors d’une nuit de pleine lune.

L’éclipse lunaire totale de ce matin s’est produite lors d’une “super Lune” - une pleine lune qui arrive lorsque la Lune est la plus proche de la Terre sur son orbite elliptique. La combinaison de la Lune éclipsée qui est à la fois pleine et relativement plus proche de la Terre la rend considérablement plus grande et plus brillante que d’habitude.

Au contraire des éclipses solaires, la Lune ne disparaît pas complètement de vue lors d’une éclipse lunaire totale. En fait elle devient rouge, lui méritant ce surnom de mauvais augure de “Lune de sang”. La couleur rouge est due à la réfraction de la lumière du Soleil qui passe à travers l’atmosphère terrestre. De plus la plupart de la lumière bleue est diffusée - le même effet qui donne au Soleil sa couleur rouge au crépuscule et à l’aube.
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Source http://www.eso.org/public/images/potw1539a/
Author ESO/M. Zamani

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Date/TimeThumbnailDimensionsUserComment
current11:49, 31 May 2018Thumbnail for version as of 11:49, 31 May 20185,616 × 3,744 (6.57 MB)A1Cafel (talk | contribs)Large
22:41, 29 September 2015Thumbnail for version as of 22:41, 29 September 20151,280 × 853 (248 KB)Warriossoft (talk | contribs)Esta imagen potw1539a ha sido Subida por WarriorSoft-Team

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