Glossary term: 星际消光
Description: 星际消光是星际介质对来自天文光源的光吸收和散射的综合效应。星际介质是存在于星系中恒星之间的空间中的物质,由气体和亚微米大小的尘埃粒子组成。与气体粒子相比,星际尘埃对星光的影响要大得多。肉眼可以观察到银河系中尘埃和气体的巨大通道,就像数百万颗恒星微弱光芒之间的缝隙。消光使对包含大量气体和尘埃的区域的观测变得困难。消光在波长较短处通常较强,使天体看起来更红(星际红化)。天文学家根据星际消光的强弱随波长的变化特性,通常使用较长的波长——如红外线或亚毫米光——来研究尘埃笼罩的区域,如恒星形成区。
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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
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