فضاء
الأقمار الصناعية المكعبة تدفع إلى سباق تجاري بين الشركات
January 30, 2018 - CubeSats are ultra-small spacecraft weighing 1.3kg or less. Most CubeSats piggyback to orbit on big, expensive rockets – but affordable rocket technology is launching a new generation of space start-ups.