Explorer 1 (31 янв 1958 г. – 31 янв 1958 г.)
Описание:
Explorer 1 was the first satellite launched by the United States. The primary science instrument on Explorer 1 was a cosmic ray detector designed to measure the radiation environment in Earth orbit.Добавлено на ленту времени:
Дата:
31 янв 1958 г.
31 янв 1958 г.
~ 0 min