🌐EnglishEnglishDeutschEspañolItalianoPortuguêsРусский中文EntityQ1553022· pop 12· linked from 7 articlesWilson effectPerceived depression in sunspot umbraeAvailable in 12 languagesEspañolDeutsch中文РусскийPortuguêsItalianoCatalanCzechSlovakTamilUkrainianConnectionsSunConceptheliosphereEntityCategoriesSolar phenomena