Yes, the Voyager 2 probe visited all four gas giant planets; Jupiter, Saturn, Uranus and Neptune. It flew by Neptune in 1989.
No spacecraft from Earth has ever landed on Neptune.
Just one.
Voyager 2, which flew by the giant planet in 1989.
Voyager 2 flew by Neptune in 1989, coming within 30,000km of the planet.
I assume you mean launched to Neptune, and not in Neptune. Only one spacecraft has ever visited Neptune, and that is Voyager 2 which passed by there in 1989.
Nobody knows for sure. If they do know, they aren't telling.
As of 2011, only one spacecraft has passed relatively close to Neptune. The Voyager 2 probe visited Neptune in 1989, having previously passed Jupiter, Saturn, and Uranus. Voyager 2 took the first close-up photos of the Neptunian moon Triton, and discovered five inner moons: Naiad, Thalassa, Despina, Galatea and Proteus.
Unfortunately, no one has ever visited Neptune as we currently lack the technology to venture out that far into space. Did you know that the Voyager 2 was the first and only spacecraft to ever visit the planet?
Only one through 2009. The Voyager 2 probe visited Neptune in 1989, having previously passed Jupiter, Saturn, and Uranus. Voyager 2 took the first close-up photos of the Neptunian moon Triton and discovered 5 new inner moons.
Every known spacecraft began on earth and went to other places. That's also true of every known drawing, component, fragment, subsystem, and model of spacecraft. Few of them ever returned to earth.
Yes. Every spacecraft ever made by humans originated on Earth and most never went farther than an orbit around Earth. Many have returned to the surface.
Yes, but they have not landed.