A little over 11 years i think :]
We cannot travel that far yet.
== ==
Humans cannot currently travel to Neptune as it is too far away and sending a crewed mission would be extremely challenging due to the long duration of the journey and the harsh conditions in space. Unmanned spacecraft, like the Voyager probes, have been sent to study Neptune and its moons.
No
Have human or human made objects travel to neptune
Neptune is 4,504,300,000 km away from the sun.
No. The best information about the planet comes from the probe Voyager 2, which passed near Neptune in August 1989. It has been studied telescopically from Earth orbit by the Hubble Telescope and from Earth observatories using adaptive optics technology.
the answer is 738,000
789,00000000000000
Not in the foreseeable future.
Pluto's unusual orbit causes it to travel inside Neptune's orbit.
It may be possible in the future, but today we are not able to travel that far.