The failures of the USSR's Mars 4-7 marked the USSR's last attempts in the 70s and early 80s to send spacecraft to Mars. Viking 1 and Viking 2 were sent by the US to gather images of Mars, with great success. Because they operated for such a long time, US will also not send anymore spacecraft to Mars until the 90s. (9 апр 1975 г. – 9 апр 1988 г.)
Добавлено на ленту времени:
Дата:
9 апр 1975 г.
9 апр 1988 г.
~ 13 years
