Home›Browse›proper distance🌐EnglishEnglishDeutschEspañolFrançaisItalianoPortuguêsTürkçeРусский한국어日本語EntityQ58959799· pop 7proper distancedistance between two events, measured in an inertial reference frame where both events are simultaneousAvailable in 7 languagesFrançaisPortuguêsEsperantoGalicianTürkçe한국어via Wikidata sitelinks · CC0Connectionsproper lengthEntity