Description: 星光在到達我們的過程中強度減弱，這一現象稱為消光。這種減弱是由於光在傳播過程中被粒子吸收和散射造成的。消光可能來自地球大氣層（稱為大氣消光）、恆星附近的物質（稱為星週消光）或恆星之間的物質（稱為星際消光）。大氣消光主要是地球大氣中存在的氣溶膠和分子，如水、二氧化碳和臭氧，在光學和近紅外波段的影響。星際消光則歸因於氣體和亞微米級塵埃粒子組成的星際物質。與氣體微粒相比，星際塵埃對星光的影響更大。消光通常在較短波長下更強，反之亦然，這使得天體看起來比其真實顏色更紅（紅化）。

Related Terms:

• 大氣消光
• 灰塵
• Interstellar Extinction

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 is an automated transliteration of the simplified Chinese translation of this term

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".