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Glossarbegriffe: Atmosphäre

Description: Die Atmosphäre ist eine Gasschicht, die einen Himmelskörper umgibt. Sie wird durch die Anziehungskraft des Himmelskörpers aufrechterhalten und ist daher an der Oberfläche des Himmelskörpers am dichtesten. In großen Höhen geht eine Atmosphäre in den interplanetaren Raum über.

Bei Planeten mit fester oder flüssiger Oberfläche ist die untere Grenze der Atmosphäre klar begrenzt. Sterne haben ein gasförmiges Inneres und daher keine eindeutige untere Grenze für ihre Atmosphäre. Eine Sternatmosphäre bezieht sich normalerweise auf die äußere gasförmige Schicht eines Sterns, durch die das Licht aus seinem Inneren in den Weltraum gelangt.

Das Magnetfeld eines Planeten kann seine Atmosphäre davor schützen, sich aufgrund des Sonnen- oder Sternwinds schnell im Weltraum aufzulösen. Im Falle der Erde schützt das Magnetfeld auch alle Organismen vor genetischen Schäden durch die schädlichen Auswirkungen des Sonnenwinds und der kosmischen Strahlung.

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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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