سؤالات شانزدهمین دوره المپیاد جهانی نجوم و اخترفیزیک | سال 2023 (لهستان)
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المپیاد جهانی نجوم و اختر فیزیک
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16th International Olympiad on Astronomy and Astrophysics 2023 Katowice, Poland
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