Glossary term: Atmósfera
Description: La atmósfera es una capa de gas que rodea un cuerpo celeste. Se mantiene gracias a la atracción gravitatoria del cuerpo celeste, por lo que es más densa en la superficie y se funde con el espacio interplanetario a gran altitud.
En los planetas con superficies sólidas o líquidas, el límite inferior de la atmósfera es claro. Las estrellas tienen interiores gaseosos, por lo que no tienen un límite inferior claro para sus atmósferas. Una atmósfera estelar se refiere normalmente a la capa gaseosa exterior de una estrella a través de la cual la luz del interior viaja hacia el espacio.
El campo magnético de un planeta puede proteger su atmósfera de una rápida disipación en el espacio a causa del viento solar o estelar. En el caso de la Tierra, también protege a todos los organismos de los daños genéticos debidos a los efectos nocivos del viento solar y los rayos cósmicos.
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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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