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حقائق وغرائب >> أسئلة فضولية
سيناريوهات النهاية: ماذا يحدث عندما ينفد وقود الشمس؟
بالنسبة لنا؛ ربما ليس هناك شيء أقدم وأدوم من الشمس، ذلك النجم القزم الأصفر الذي أضاء الأرض لأكثر من 4 مليارات سنة؛ لكن نجمنا هذا لن يدوم، والعلماء متيقنون مما سيحدث عندما ينفد وقود الشمس. تُزود الشمس نفسها بالطاقة عن طريق دمج ذرات الهيدروجين بالغة السخونة في لبّها، وتؤدي هذه العملية إلى تشكيل الهيليوم والكثير من الطاقة؛ ولكن مع الزمن؛ ستنفَد كمية الهيدروجين الموجودة في الشمس، وعندما يحدث ذلك بعد حوالي 5 مليارات سنة؛ سيتعيّن على الشمس إيجاد مصدر آخر للطاقة. في البداية؛ هذا لن يمثّل مشكلةً، فاليوم؛ دمج الهيدروجين يمكّن لب الشمس من تطبيق ضغط يقاوم الضغط الذي يتعرّض…
تمت
عملية الاشتراك بنجاح
عذراً،
عذرا،أنت مشترك مسبقاً بالنشرة البريدية
