Destroy all asteroids until you see an arrow on the computer, then turn right until you see a portal.
NOTE: I have never heard of this game but the previous answer was "distroy all astrods intell you see a arow on they computer ther tern right intell you see a portal".
To get to the asteroid island, you have to fly your ship through the asteroids to X=11 Y=84-89 You wont miss it. Then climb the crystal to get the key and open the portal.
fly southeast
TO get into the asteroid castle you have to complete the puzzle on the door.
go to the middle of the asteroid belt and it's on a asteroid go down to it.
On poptropica, when you get to the asteroid belt, if you are looking for Mordreds little castle that holds the key, go to: X 12 and Y 80. There you will find the little asteroid Mordred is hiding on.
Becuase they can be.
go through the asteroidbelt until you find a large asteroid with a giant Crystal on it.
I'ts in center of the asteroid belt
if you mean the planet in the asteroid belt then it is X:11 Y:82
The coordinates are X 11, Y 82.
you fly to a large asteroid in the asteroid belt and land there. that is the crystal gate when you climb to the top
you go past the sun then down until it says Warning: Entering Asteroid Belt.
She the PRINCESS is on a asteroid being held hostage by Morder