You will use the saucer Excalibur to reach space, then build a spaceship on the Pewter Moon. (see related questions for how)
You can't get to Jungle planet without a spaceship. You can make a spaceship at the moon.
You don't type it. You have to guide your spaceship there.
To fly to the Pewter Moon on Astro Knights Island, you need to build a spaceship by collecting spaceship parts found throughout the island. Once you have assembled the spaceship, you can use it to fly to the Pewter Moon by clicking on it and selecting the moon as your destination.
There is nowhere to enter a password. Fix the saucer and get the coordinates you need to fly it. (see related questions)
With the saucer Excalibur, you go to the Pewter Moon, and there you make a real spaceship to travel the solar system. (see related question)
Because kids were complaining that all the other islands were too easy, so Jeff (creator of poptropica) wanted to make a super hard island and make every other island after astro-knights hard as well. But kids were complaining that every island after Astro-Knights was hard! so they made a game guide for Astro-Knights
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To power the saucer Excalibur, you have to get a new green fuel rod. There is one in the robot invader in the dungeon, but you have to enter the back way. Once you have a new spaceship from the Pewter Moon, it gos through space as controlled by your mouse cursor.
The island that uses spacecraft to travel through the quest is Astro Knights Island.
Once you get to the Pewter Moon, you can use the holopad at AstroZone to create a new spaceship (the type doesn't really matter, so make it look any way you like).
you have to go through the vent in the dungeon and make the alien self destruct and then you click on the owl, then the fuel rod and you get it.
Only one is available, but it would make a nice keepsake.