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النجوم الميتة تحطم الكويكبات.. لكنها تعجز عن سحقها إلى غبار

By الجزيرة - رياضة · 23 hours ago · 1 min read الجزيرة - رياضة ↗

النجوم الميتة تحطم الكويكبات.. لكنها تعجز عن سحقها إلى غبار

ما يعرفه ريفو عن الخبر

كشفت دراسة جديدة أن جاذبية الأقزام البيضاء تمزق الكويكبات إلى كتل صخرية كبيرة بدلا من تحويلها إلى غبار دقيق.
تعود هذه النتائج إلى وجود قوى داخلية تمنح الكويكبات تماسكا يمنعها من التفتت الكامل إلى حبيبات مجهرية.
تطرح النتائج تساؤلات حول العمليات الإضافية مثل التصادمات أو الدوران السريع التي قد تكون مسؤولة عن طحن الصخور وتحويلها إلى غبار.
تساعد هذه الدراسة في فهم كيفية تطور الحطام حول الأقزام البيضاء وتفسير الأرصاد الفلكية للحلقات المحيطة بها.

حول نجوم ماتت منذ زمن، تدور حلقات من غبار كوكبي ظن العلماء أنهم يعرفون كيف تشكلت. لكن حسابات جديدة تكشف أن الجاذبية، مهما اشتدت، تتوقف عند حدود غير متوقعة تماما.

المصدر: الجزيرة – رياضة

#الجزيرة

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