Glossary term: Atmospheric Extinction

Description: Atmospheric extinction is the scattering or absorption of the light from celestial objects passing through the Earth's atmosphere. Atmospheric gases allow the entry of visible light and are transparent to radio and some infrared light, so these types of ground-based telescopes are widely used. To avoid this phenomenon and to observe light of other wavelengths, some telescopes are located beyond the atmosphere.

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Term and definition status: This term and its definition have been approved by a research astronomer and a teacher

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".