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القمر العملاق ظواهر طبيعية

ما هو القمر العملاق؟

07 ديسمبر 2013

ظاهرة القمر العملاق (Supermoon): هي تزامن اكتمال القمر مع وصوله إلى أقرب نقطة من الأرض في مداره البيضاوي، مما يجعله يبدو كقرص كبير أكبر من القمر المعتاد، والاسم الفني أو التقني لهذه الظاهرة هو "الإقتران القمري لنظام أرض - قمر- شمس"، مصطلح "القمر العملاق" ليس مصطلحا فلكيا بل مصطلح مؤصل في علم التنجيم الحديث

تسمية "القمر العملاق" أطلقت من قبل المنجم "ريتشارد نولل" في سنة 1979.

مسافة القمر إلى الأرض تتراوح كل شهر تقريبا بين 357000 كلم (222000 ميل) و406000 كلم (252000 ميل) استنادا إلى المدار البيضاوي الشكل الذي يسلكه القمر في دورانه حول الأرض (المسافة معينة من المركز إلى المركز).

طبقا لناسا، القمر أثناء هذه الظاهرة (Perigee) يكون أكبر حجما بـ 14 % (حسب ما يظهر للعيان) وأكثر إشراقا بـ 30% من حالته وهو في أبعد نقطة في مساره حول الأرض.

القمر العملاق ظواهر طبيعية معلومات علمية، معلومات ثقافية

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