السنة الضوئية

كم تساوي السنه الضوئية؟

Keep going السنة الضوئية 12 ديسمبر 2012

كم تساوي السنه الضوئية؟ السنة الضوئية مقياس فلكي للمسافات الهائلة بين الأجرام السماوية وتُعرف السنة الضوئية بمقدار المسافة التي...

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