Live Thursday, 15 October 2026

BREAKING

Egyptian FM holds calls with Iranian counterpart , U.S. Envoy on regional developmentsZverev into French Open last-fourIsraeli fire kills four people in Gaza, medics sayEgypt, Singapore discuss expanding cooperation in tourism, antiquitiesAncelotti eases Neymar W. Cup fearsArab, Islamic states condemn Israeli actions at Al-AqsaSyria Hopes for Terrorism Delisting to Spur Economic RecoveryBenfica linked with Fulham’s SilvaVan der Breggen takes Giro leadKremlin: Saudi Arabia Named Guest of Honor at St. Petersburg Economic ForumTrump administration proposes 25% tariff to punish Brazil over trade practicesرياضة محلية‘Really cool to share this journey with her’: Michelle Wie West playing for her family at U.S. Women’s OpenArchaeological Replicas Showcase Saudi Arabia’s Rich History at Kuala Lumpur Int’l Book FairRenewable Energy Helps Red Sea Global Avoid 118,000 Tons of Carbon EmissionsLetter: Carol Rumens obituaryEngland v India: third and deciding women’s T20 cricket international – liveHealthVolunteers serve comfort food in a worrying Ebola outbreak – Sault Michigan NewsEconomyTrump signs AI executive order asking companies to give government early access to modelsLocalSouth West Water fined nearly £2million after supplying homes with parasite-ridden water that left four people in hospital – and telling people it was safe to drinkScience & TechYour car is following you – how to reclaim your data privacy on the open roadEgyptian FM holds calls with Iranian counterpart , U.S. Envoy on regional developmentsZverev into French Open last-fourIsraeli fire kills four people in Gaza, medics sayEgypt, Singapore discuss expanding cooperation in tourism, antiquitiesAncelotti eases Neymar W. Cup fearsArab, Islamic states condemn Israeli actions at Al-AqsaSyria Hopes for Terrorism Delisting to Spur Economic RecoveryBenfica linked with Fulham’s SilvaVan der Breggen takes Giro leadKremlin: Saudi Arabia Named Guest of Honor at St. Petersburg Economic ForumTrump administration proposes 25% tariff to punish Brazil over trade practicesرياضة محلية‘Really cool to share this journey with her’: Michelle Wie West playing for her family at U.S. Women’s OpenArchaeological Replicas Showcase Saudi Arabia’s Rich History at Kuala Lumpur Int’l Book FairRenewable Energy Helps Red Sea Global Avoid 118,000 Tons of Carbon EmissionsLetter: Carol Rumens obituaryEngland v India: third and deciding women’s T20 cricket international – liveHealthVolunteers serve comfort food in a worrying Ebola outbreak – Sault Michigan NewsEconomyTrump signs AI executive order asking companies to give government early access to modelsLocalSouth West Water fined nearly £2million after supplying homes with parasite-ridden water that left four people in hospital – and telling people it was safe to drinkScience & TechYour car is following you – how to reclaim your data privacy on the open road

Prices

US dollar53.10EGPEuro59.36EGPBritish pound70.22EGPSaudi riyal14.16EGPUAE dirham14.46EGPKuwaiti dinar170.85EGPJordanian dinar74.89EGPQatari riyal14.59EGPTurkish lira1.07EGPChinese yuan7.92EGPGold 247,100.67EGP/gGold 216,213.09EGP/gGold 185,325.51EGP/gSilver97.14EGP/g

US dollar53.10EGPEuro59.36EGPBritish pound70.22EGPSaudi riyal14.16EGPUAE dirham14.46EGPKuwaiti dinar170.85EGPJordanian dinar74.89EGPQatari riyal14.59EGPTurkish lira1.07EGPChinese yuan7.92EGPGold 247,100.67EGP/gGold 216,213.09EGP/gGold 185,325.51EGP/gSilver97.14EGP/g

Science & Tech

28 ألف كيلومتر في الساعة.. لماذا تحتاج الأقمار القريبة إلى محركات؟

By الجزيرة - اقتصاد · 1 day ago · 1 min read الجزيرة - اقتصاد ↗

ملخص الخبر

تواجه الأقمار الصناعية في المدارات المنخفضة جدا تحدي فقدان الارتفاع بسبب مقاومة جزيئات الهواء في الغلاف الجوي.
تمول وكالة الفضاء الأوروبية مشاريع لتطوير تقنيات دفع كهربائية ومواد مقاومة للتآكل لضمان استمرار عمل الأقمار في مداراتها.
تدرس الوكالة تقنية الدفع الكهربائي المتنفس للغلاف الجوي التي تستخدم جزيئات الهواء المتناثرة كمصدر لدفع الأقمار الصناعية.
تساهم المدارات المنخفضة جدا في تحسين دقة صور مراقبة الأرض وتقليل زمن انتقال الإشارات وتسهيل عملية التخلص من الحطام الفضائي.

ملخص كتبه الذكاء الاصطناعي من نص الخبر في مصدره.

تسعى أوروبا لتطوير أقمار اصطناعية تتنفس الهواء، وتدور حول الأرض كل 88 دقيقة تقريبا، مستفيدة من جزيئات الغلاف الجوي لتوليد الدفع ومقاومة الهبوط، في تقنية قد تغير مستقبل الفضاء.

المصدر: الجزيرة – اقتصاد

0 Views

أضف تعليقاً Cancel reply