Get the hovercraft from the mill attic and fix the saucer that is crashed out in the swamp to the right of the mill. Once you set the coordinates to the Pewter Moon, you can travel there. You will build a new spaceship to travel to the three planets that the space knights have gone to.
(see the related questions)
Alien spaceships are coming and going from the planets in the solar system. They may attack you when you try to go there.
There is no jail on Astro Knights Island. There is a castle dungeon, where an attacking alien robot is being held after his capture. (see the related question)
Terd on the toilate
u just press on it
This means you have already completed the Arturus part of Astro Knights Island. Your spaceship should be parked on top of the castle if you return to the planet.
On the Pewter Moon, see the manager at AstroZone about replacing your ship.
The Princess Is Held By Alien's.
you get the fuel rod and enter the coordinates then you go to astrozone and ask the alien to use a ship
You ask the alien manager of the store then you can make your own rocket. E Z .
You shoot them
You get the alien "fuel rod" from the robot invader in the dungeon, and use it to power the saucer Excalibur, so you can go to space. (see related question)
When you get a new fuel rod, just place it in the spot on the saucer and it will lock in. (see related question)