دانشنامه رویت هلال ایران خوش آمدید
In December of 2017, President Donald Trump signed Space Policy Directive-1, in which the president directed NASA “to lead an innovative and sustainable program of exploration with commercial and international partners to enable human expansion across the solar system and to bring back to Earth new knowledge and opportunities.” In …
مشاهده بیشتر »ماه و کمپین پایدار ناسا
