🌐한국어EnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsTiếng ViệtTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ978297· pop 23· linked from 188 articles연성계system of two astronomical bodies which orbit each otherAvailable in 23 languagesEspañolFrançais中文РусскийPortuguêsItalianoالعربيةAsturianBasqueCatalanConnectionsSunConceptSolar SystemEntityCategoriesAstronomical dynamical systemsBinary systemsCelestial mechanics