أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
in1947 a sailankan scientist gave this idea that global communication can be established by usinf8 to35 satellite stations in the space
Wernher Magnus Maximilian, Freiherr von Braun (March, – June,) was a German American aerospace engineer[