Nasa In Arabic - ناسا بالعربي - هل ترغب بصناعة مذنب؟ قد لا تود ذلك، إلا أن علماء الفضاء في صدد تقديم وصفة للعناصر المكونة للمذنبات مستخدمين بيانات من تلسكوب سبيتزر الفضائي
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Graph of rising carbon dioxide level in Greece. Air pollution concept. Ecological catastrophe Stock Photo - Alamy
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