وفر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.

اشترك الآن

تمت عملية الاشتراك بنجاح

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عذراً، عذرا،أنت مشترك مسبقاً بالنشرة البريدية

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عذراً، هناك مشكلة في البريد الالكتروني

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content_cookies: int(0)
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get_post_type: string(7) "concept"

فضاء وفلك

سديم |  Nebula

18 يوليو 2019


هي سحابات بين نجمية يجتمع فيها الكثير من الغبار الكوني. تسمح كثافة الهيدروجين وقوة الضغط في بعض السدم بتكون النجوم.