If you land on earth with your space ship, it will be on top of the castle waiting for you!
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.
Whenever you leave space, your spaceship is parked on top of the castle in Arturus.
Yes, it's parked right on top of the castle in Arturus.
If you leave the island or log off while in space, or return to Arturus for any reason...Your spaceship parks on top of the castle.
There is no way to reset an island. On Astro Knights, if you leave the island from space, the spaceship parks on top of the castle in Arturus. To replay the island, you would have to create a second username. You can have as many as you want, saved or unsaved.
Whenever you return to Poptropica planet (Arturus kingdom), your spaceship is parked on the roof of the castle.
If you log off while in space, your ship parks on top of the castle in Arturus.
At the end of the island quest, you receive the Island Medallion. At that time, or if you return to the planet Poptropica for any reason, your spaceship is parked on top of the castle.
Arturus
Returning from space to Arturus is automatic when you have defeated Mordred. All that remains is to get your Knighthood (medallion) and leave the island. If you return to Arturus during the game, the spaceship is parked on top of the castle.
In order to go to another island, you have to leave on the blimp parked at the Mordred Museum. When you have a spaceship and go to Arturus, the spaceship parks on top of the castle.
Once you have built a new spaceship on Astro Knights Island, it will park on top of the castle whenever you leave the island.