No, because you need the three knights to go with you. (see related question)
Once you have beaten all three planets and have all three knights with you, travel to the secret asteroid in the Asteroid Belt (down and left in the solar system). The asteroid is at X-11 Y-84.
The asteroid with the Golden Key is in the asteroid belt at X-11 Y-82. (This is in the lower left of the solar system.) You must have completed all three planets (jungle, ice, and fire) and have all three knights with you before going to the secret asteroid.
If you have all three Knights with you, proceed to the Secret Asteroid (X-11 Y-82) and rescue the Princess. If not, there's nothing to do but shoot space rocks.
In the asteroid belt, at X-11 Y-82. (This is in the lower left of the solar system.) You must have completed all three planets (jungle, ice, and fire) and have all three knights with you before going to the secret asteroid.
The knights tell of a secret portal on a giant asteroid. The planetoid is hidden in the asteroid belt at the lower left of the solar system, near X-11 Y-82. That is where the Binary Bard has taken the Princess.
In the asteroid belt, at X-11 Y-82. (This is in the lower left of the solar system.) You must have completed all three planets (jungle, ice, and fire) and have all three knights with you before going to the secret asteroid.
The three knights will tell you of a fabled giant asteroid, in the asteroid belt at the lower left of the solar system. The Binary Bard's secret lair is at X-11 Y-82.
Mordered is on the secret crystal island that you can access in the asteroid belt once you have gotten all the knights. Be careful he is the princess waiting outside the castle so don't click on him.
His secret planetoid is hidden in the Asteroid Belt. (Specifically, at X-11 Y-84.) (see related question)
The knights will tell you of a secret asteroid hidden in the Asteroid Belt. Go there, and you will find it near X-11 Y-84. You will need all three knights to pull out the Golden Key and open the portal to the castle in a distant galaxy. You will fight the Binary Bard (Mordred) in his robot warrior suit. (see related question)
It is at X-11 Y-84 and looks nothing like the other asteroids. (see image links below)
YOU, the player, are the Chosen One when you arrive at the secret asteroid and must pull the Golden Key from the stone. If you don't have all three knights, you have wasted a trip. (See the related questions for help.)