4 ms·
US had a couple good milestones with the Mariner program. Mariner 2 was the first Venus flyby in 1962, and Mariner 4 was the first Mars flyby in 1965.
by WillPostForFood 1y ago
US had a couple good milestones with the Mariner program. Mariner 2 was the first Venus flyby in 1962, and Mariner 4 was the first Mars flyby in 1965.