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)
check_post_to_show: string(2211) "{"is_valid":1,"global_remaining_posts_to_view":0,"remaining_posts_to_view":0,"number_all_post":0,"number_post_read":0,"exceeded_daily_limit":0,"is_watched_before":0,"sso_id":11908,"user_agent":"CCBot\/2.0 (https:\/\/commoncrawl.org\/faq\/)","user_ip":"18.207.160.97","user_header":{"SERVER_SOFTWARE":"Apache\/2.4.52 (Debian)","REQUEST_URI":"\/%D8%A7%D9%84%D9%85%D9%81%D8%A7%D9%87%D9%8A%D9%85-%D8%A7%D9%84%D8%B9%D9%84%D9%85%D9%8A%D8%A9\/%d8%af%d8%b1%d8%a8-%d8%a7%d9%84%d8%aa%d8%a8%d8%a7%d9%86%d8%a9\/","REDIRECT_HTTP_AUTHORIZATION":null,"REDIRECT_STATUS":"200","HTTP_AUTHORIZATION":null,"HTTP_X_FORWARDED_PROTO":"https","HTTP_CONNECTION":"upgrade","HTTP_HOST":"popsciarabia.com","HTTP_ACCEPT_ENCODING":"gzip","HTTP_CF_RAY":"8320e3efbf063b4a-IAD","HTTP_CF_VISITOR":"{\\\"scheme\\\":\\\"https\\\"}","HTTP_USER_AGENT":"CCBot\/2.0 (https:\/\/commoncrawl.org\/faq\/)","HTTP_ACCEPT":"text\/html,application\/xhtml+xml,application\/xml;q=0.9,*\/*;q=0.8","HTTP_ACCEPT_LANGUAGE":"en-US,en;q=0.5","HTTP_CF_CONNECTING_IP":"18.207.160.97","HTTP_CDN_LOOP":"cloudflare","HTTP_CF_IPCOUNTRY":"US","PATH":"\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin","SERVER_SIGNATURE":"
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get_post_type: string(7) "concept"

فضاء وفلك

درب التبانة |  Milky Way

18 يوليو 2019


هو اسم مجرتنا والتي يقدر العلماء بأن قطرها يصل إلى 100 ألف سنة ضوئية. تحتوي على نجومٍ يتراوح عددها بين 200 إلى 400 مليار نجم. ويرجع سبب التسمية إلى شكل المجرة الذي رآه القدماء في السماء.