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Glossarbegriffe: Mondfinsternis

Description: Eine Mondfinsternis entsteht, wenn der Mond in den Schatten der Erde eintritt. Eine Mondfinsternis kann nur dann eintreten, wenn die Sonne, die Erde und der Mond hinreichend genau auf einer Linie liegen. Dabei befindet sich die Erde direkt zwischen Sonne und Mond. Daher kann eine Mondfinsternis nur in einer Vollmondnacht stattfinden. Eine totale Mondfinsternis tritt auf, wenn sich der Mond vollständig im Schatten der Erde befindet. Eine partielle Mondfinsternis tritt auf, wenn der Mond nur teilweise vom Erdschatten bedeckt ist. Die Art und Länge einer Mondfinsternis hängt von der genauen Position des Mondes auf seiner Umlaufbahn um die Erde zum Zeitpunkt der Finsternis ab.

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".

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Two astronomers view a lunar eclipse. Between them in the partly cloudy sky, a series of bright circles trace a curved path

The Eclipse Between Us, by Muhammad Rayhan, Indonesia

Bildunterschriften: Second place in the 2021 IAU OAE Astrophotography Contest, category Total lunar eclipse. Total lunar eclipses belong to the rather spectacular celestial events and can be observed easily with and without a telescope. Here we see the stages of the total lunar eclipse of 31.1.2018 photographed in Indonesia: starting with the entry of the full moon disk into Earth's round umbra, the totality as Blood Moon, and the beginning of the Moon's exit from Earth's umbra until moonset.
Bildnachweis: Muhammad Rayhan/IAU OAE

License: CC-BY-4.0 Creative Commons Namensnennung 4.0 International (CC BY 4.0) icons


The Moon behind jagged, snowy mountains. The lower two thirds of the Moon are darker and redder than the upper third

The eclipsed Moon sets near the Rochetta di Prendera, Dolomiti Unesco, by Alessandra Masi, Italy

Bildunterschriften: First place in the 2021 IAU OAE Astrophotography Contest, category Total lunar eclipse. A lunar eclipse occurs when the full moon moves into the Earth`s shadow. This is the case when the Sun, Earth and Moon are exactly or very closely aligned. The reddish light reflected from the lunar surface is caused by sunlight that has been refracted on its way through Earth´s atmosphere in the direction of the Moon. It appears reddish because of the Rayleigh scattering of bluer light. The round shape of the Earth's shadow visible on the lunar surface was a proof for Aristotle that the Earth must be a sphere. This photo shows the eclipsed Moon that sets near the Rochetta di Prendera, Dolomiti Unesco, Italy, on 21 January 2019.
Bildnachweis: Alessandra Masi/IAU OAE

License: CC-BY-4.0 Creative Commons Namensnennung 4.0 International (CC BY 4.0) icons