🌐EnglishEnglishBahasa IndonesiaDeutschEspañolPolskiPortuguêsРусскийالعربيةفارسی한국어中文日本語EntityQ837505· pop 22· linked from 210 articlesrelativity of simultaneityconcept that distant simultaneity is not absolute, but depends on the observer's reference frameAvailable in 21 languagesEspañolDeutsch中文РусскийPortuguêsالعربيةArmenianBahasa IndonesiaCatalanConnectionsframe of referenceEntityworld lineEntityCategoriesHistory of physicsSpecial relativityThought experiments in physics