7 дек 1996 г. - Mars Global Surveyor
Описание:
Mars Global Surveyor entered orbit on September 12, 1997. After a year and a half trimming its orbit from a looping ellipse to a circular track around the planet, the spacecraft began its primary mapping mission in March 1999. It observed the planet from a low-altitude, nearly polar orbit over the course of one complete Martian year, the equivalent of nearly two Earth years.Добавлено на ленту времени:
Дата:
7 дек 1996 г.
Сейчас
~ 27 г назад
