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Jupiter is visible with the naked eye and has been known for thousands of years. No one looked for it and it is not known when it was first noticed.

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How long does it take planet neptune to circle the sun?

It takes 164.79 earth years.


What are some missions to Neptune and their dates and how long did it take them to reach the planet?

The planet Neptune has been explored by only one explorer, Voyager 2. Launch date - 20 August 1977 Reached Neptune - 25 August 1989


How long would it take to travel around planet Neptune?

about five times less than earth


How close can you get to planet Neptune?

neptune is the eighth planet from the sun . Comment: You can get as close as you like, but you would need a very good spacecraft and it would take years to get there.


How long did it take to get to Neptune?

It took twelve years to get from earth to neptune.


What planet take the most time to orbit the sun?

Neptune. It would be Pluto, but Pluto is a dwarf planet ( a planet that was a planet, but decided that it wasn't a planet)


You were the farthest planet from the sun now you are not?

The farthest planet from the sun used to be Pluto. Pluto is now considered to be a dwarf planet, not a planet. When Pluto was a planet, its orbit would sometimes take it closer to the sun than Neptune, making the Neptune the farthest planet from the sun for that period of time.


Why travel to Neptune?

neptune is a fun and enjoying planet! You can ice skate on the cold side or take a nice tan i know you will enjoy it


How long does it take your planet to revolve around the sun?

Well, I live on Neptune, so our year is like 165 Earth years. I'll never have a birthday. -.-


How long does it take Triton to revolve around Neptune?

it take Triton about 6 days to orbit Neptune


What is the last planet from the sun?

Neptune or maybe Pluto, although it's considered a dwarf so not an official planet anymore.


Which planet has largest orbit?

Neptune has the longest orbit of any planet in our solar system, about 18 billion km (11 billion miles). Neptune requires nearly 165 years to complete one solar orbit. Eris take 557 years to journey once around our sun.