get the new one on the top of the roof in a shop with drunkards.
jump
The UFO has a broken fuel rod. Go to the dungeon and click on the robot. It will explode, leaving a new fuel rod. Click on Merlin and he will fetch the fuel rod for you.
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You have to fix the saucer by obtaining a new fuel rod. There is one in the robot invader held in the dungeon. Once it is replaced, you can dial in the coordinates to launch the saucer. (see related questions)
Fix the saucer, beat the three planets, and defeat the Binary Bard.
Go to the crashed saucer. You will see that it needs a new fuel rod, and there is a place to enter the coordinates to outer space locations. If you fix it and get the X and Y numbers you need, you can fly into space.
You have to fix the saucer by obtaining a new fuel rod. There is one in the robot invader held in the dungeon. Once it is replaced, you can dial in the coordinates to launch the saucer. (see related questions)
The first time, you have no choice. Fix the saucer and launch it (see the related question). Once you have a spaceship, you can land on Poptropica, the Pewter Moon, or any planet by clicking on it. (The exception is the ice planet, see related question)
To fix the damaged Excalibur you need a new fuel rod. You can get one from the robot invader in the dungeon. The missing page of Mordred's Journal should have the coordinates for the nearby moon. You won't have enough fuel to reach the planets on the Queen's list. (see related questions)
You can't fix or refill the broken fuel rod. Fortunately, there is a replacement that is powering the imprisoned robot invader. Go back to the dungeon through Mordred's secret laboratory, and you can get the replacement rod with the help of the robot owl Merlin. (see related question)
Once you fix the crashed saucer Excalibur, you can go to the pewter moon and build a new spaceship there. (see related question)
There is nowhere to enter a password. Fix the saucer and get the coordinates you need to fly it. (see related questions)