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the first spacecraft to explore mars is the mariner 4
Mariner 4
The mariner spacecraft first landed on Mars 1971 I think.
Every planet except Pluto has been explored by spacecraft.
Mariner 4
The mariner spacecraft explored Mercury, Mars, and Venus. The first successful space probe and first spacecraft visit to a planet was Mariner 2.
The mariner is a space probe that was sent to space to expolre mostly Venus but also explored other planets.
The Mariner spacecraft were unmanned at launch.
Mariner 4
The Mariner spacecraft landed on the planet Mars, and the Apollo spacecraft landed on the moon.
Mariner 9
The Mariner 2 spacecraft inspected Venus in late 1962.
Mariner 10
The Mariner 1 spacecraft was unmanned spacecraft to fly to mars
the name of the first spacecraft to first observe venus was venera 3. The year it observed venus 1962.
Mariner 10 and Messenger.
the first spacecraft to explore mars is the mariner 4