منابع بازافغانستان آنتې چلوي او اندو ياده کينيس شِراونچې

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Expanding Universe

     
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This explains how astronomers think the universe and solar system formed and how elements of the periodic table developed.


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لِکِکال

چرکن کيکالا

NASA

جواز/ چاپس حق دارکاليى

CC 0 / public domain

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