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حقائق وغرائب >> أسئلة فضولية
لماذا الفضاء شديد البرودة بينما الشمس شديدة الحرارة؟
سؤال ممتاز. على عكس كوكبنا معتدل الحرارة، فإن نظامنا الشمسي مليء بالأماكن التي تسودها درجات حرارة متطرفة. الشمس هي عبارة عن كتلة من الغاز والنار تبلغ درجة حرارة داخل نواتها حوالي 15 مليون درجة مئوية، بينما تبلغ درجة حرارة سطحها حوالي 5500 درجة مئوية. في الوقت نفسه، فإن درجة حرارة الخلفية الكونية (أي درجة حرارة الفضاء بمجرد الابتعاد بما يكفي للهروب من الغلاف الجوي المعتدل للأرض) تقترب من 270- درجة مئوية، كيف يمكن لهذا أن يحدث؟ If the sun is hot how is outer space cold ? — Jacoby Brissett (@JBrissett12) July 10, 2019 تنتقل الحرارة عبر الكون كإشعاع، وهي…
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