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US dollar49.79EGPEuro57.41EGPBritish pound67.01EGPSaudi riyal13.28EGPUAE dirham13.56EGPKuwaiti dinar161.33EGPJordanian dinar70.22EGPQatari riyal13.68EGPTurkish lira1.04EGPChinese yuan7.36EGPGold 246,914.28EGP/gGold 216,049.99EGP/gGold 185,185.71EGP/gSilver103.21EGP/g

Health

لأول مرة.. صورة تكشف سطح الشمس بأدق تفاصيله حتى الآن

By CNN بالعربية - صحة · 60 minutes ago · 1 min read CNN بالعربية - صحة ↗

لأول مرة.. صورة تكشف سطح الشمس بأدق تفاصيله حتى الآن

تمكّن علماء من التقاط الصورة الأكثر دقة لسطح الشمس حتى الآن أثناء اختبار تلسكوب جديد. وتُظهر الصور بلازما ساخنة دوّامية قد تساعد على تفسير كيفية تخزين الشمس للطاقة وإطلاقها. ويعتقد العلماء أنها قد تفسر أحد الألغاز المستمرة المتعلّقة بالشمس، المتمثّل في سبب كون غلافها الجوي الخارجي أكثر حرارة من سطحها.

يتراوح عرض هذه الدوامات بين نحو 19 و160 كيلومترًا. قد يبدو هذا الحجم هائلًا، لكنه في الواقع يُعد صغيرًا جدًا إذا ما قورن بمساحة سطح نجم. وبحسب الدراسة، تتشكّل هذه الدوامات عندما…

المصدر: CNN بالعربية – صحة

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