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.
you have to find the UFO in astro knights island.
Saturn star moon
Yes, anytime you are back on the Pewter Moon.
Dodge their shots and fire back. Three hits will take out an alien ship. If you lose shields, transport back to the Moon for a new spaceship.
When your on the moon just jump to the big building and he is inside.
press the moon button then figure out the combination
get the fuel and put it in the rocket ship and put in 56 and 52.
You must enter the Astrozone building and swap your saucer for a new ship, which you build on the Holopad.
When the Excalibur crashes on the Pewter Moon, go to Astro Zone and the manager will arrange for you to have a new ship holographically constructed outside.
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)
The missing page is under his bed at the museum, and gives the coordinates for the Pewter Moon. The rest is just the island storyline.