كيف تؤثر المسافة في اللمعان الظاهري للنجوم أكتب فرضية?
حل مادة العلوم رابع ابتدائي الفصل الدراسي الثاني ف2كلما زادت المسافة بين الأردض والنجوم يقل اللمعان الظاهري للنجوم.
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كيف تؤثر المسافة في اللمعان الظاهري للنجوم أكتب فرضية?