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Voyager 1 was launched on the 5th of September 1977 and Voyager 2 was launched before voyager 1 on the 20th of August 1977.
yes voyager 2 is a space probe
Voyager 1 never visited Neptune.
Voyager 2 has.
Voyager 2 is currently the only scientific instrument to do a fly-by of Neptune.
Voyager 2 is a space probe.
Voyager 1 and Voyager 2.