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Glossary term: Unité astronomique

Description: Une unité astronomique (UA) est une unité conventionnelle de distance égale à exactement 149 597 870,7 kilomètres (km). Cela correspond approximativement à la distance moyenne entre la Terre et le Soleil, ce qui était une définition courante de l'UA. L'UA est souvent utilisée pour mesurer les distances dans le système solaire et dans d'autres systèmes planétaires ou stellaires. Par exemple, Neptune orbite à environ 30 UA du Soleil

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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 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".