yes
No voyager 2 or two was the only spacecraft to visit Neptune.
No, Neptune is a gas planet and has no terra firma for a desert or any other land feature.
Yes, Neptune has one known spacecraft, Voyager 2, which flew by the planet in 1989 and provided valuable data. There are no known robots or satellites currently in orbit around Neptune.
No satellites have directly explored Neptune, but the Voyager 2 spacecraft did a flyby in 1989, providing valuable data and images of the planet. Currently, there are no dedicated missions to Neptune, but some spacecraft may conduct flybys of the planet as part of their trajectories to other destinations in the outer Solar System.
Only one of Neptune's moons.
No space missions have landed on Neptune or flown by it. The only spacecraft that has visited Neptune is Voyager 2, which conducted a flyby of the planet in 1989. There are no current plans for future missions to Neptune.
No. Neptune is a gas planet.
Neptune has not had any space exploration missions. However, it has been visited by the Voyager 2 spacecraft, which flew by the planet in 1989 and provided valuable information about its atmosphere, moons, and rings. There are no current plans for future missions to explore Neptune directly.
No. Neptune is a planet. It has several moons.
There is no known life on any planet other than Earth.
there isn't any proof of any alien spacecraft even exists but even if aliens exist they would have some sort of spacecraft to go to earth in because there isn't any other known way of getting living things from planet to planet.
Because of its composition. Neptune is made up of water more than any other substance.