🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiPortuguêsSvenskaTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ2482717· pop 20· linked from 36 articlesparticle horizonthe maximum distance from which light from particles could have traveled to the observer during the age of the universeConnectionsBig BangEntityInternational Standard Book NumberEntityCategoriesPhysical cosmologyPhysical horizons