Glossary term: 极光
Description: 极光是地球大气中呈现的弥散的多变彩色光,主要出现在极地地区。在北半球被称为北极光或极光,在南半球则称为南极光。极光的颜色从绿白色到红色,通常出现在大约100公里的高度,形成围绕地磁极的两个不规则极光椭圆。当来自太阳风或日冕物质抛射的带电粒子被地球磁层捕获,并被上层大气中的磁场集中到一起时,它们会沿着地球的磁场线向极地螺旋运动。带电粒子与大气中的原子和分子相互作用,产生极光的光芒。这种现象在太阳活动强烈时尤为显著。极光还在太阳系的其他行星上被也会被观测到,特别是在木星和土星上。
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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
This translation is based on an older version of the English glossary term and definition
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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