The fuel rod is in the alien invader in the dungeon. Enter through the secret underground lab : push down the dirt wall and make your way to the back gate, which was opened when you pulled the switch from the library entrance.
(see related questions)
I forgot
get the fuel and put it in the rocket ship and put in 56 and 52.
you get the fuel rod and enter the coordinates then you go to astrozone and ask the alien to use a ship
Your ship never gets lost.
go to the mill and get the ship
its on top of the castle
Go to Mordred's tunnel and you'll see the robot. Get the fuel rod and then go to the ship. From then on, you'll be in SPACE!
You have to get a new fuel rod for the saucer and some coordinates to fly to. (see the related questions)
Terd on the toilate
u just press on it
Bobby shout da
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.