🌐EnglishEnglishDeutschFrançaisTiếng ViệtTürkçeРусскийالعربية한국어中文日本語EntityQ1209551· pop 15· linked from 31 articlesdensity wave theoryAlso known as Lin-Shu density wave theorytheory to explain the spiral arm structure of spiral galaxiesAvailable in 15 languagesFrançaisDeutsch中文РусскийالعربيةCatalanDanishFinnishNorwegianTiếng ViệtConnectionsluminous infrared galaxyEntitystarburst galaxyEntityCategoriesExtragalactic astronomyGalactic astronomy