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5 August 2021
light-year
(n.) distance that light travels in one year; about 6,000,000,000,000 miles.
(فلك) سَنَةٌ نوريَّةٌ أو ضوئيَّةٌ: مسافةٌ يقطعها الضوءُ في سنةٍ واحِدة
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