Below you will find the solution for: Ernest Cline's Armada finds Zack preparing against a perceived attack from aliens hailing from Europa a moon of this planet Jeopardy .
Since you already solved the question Ernest Cline's Armada finds Zack preparing against a perceived attack from aliens hailing from Europa a moon of this planet which had the answer JUPITER, you can simply go back at the main post to check the other answers. You can do so by clicking the link here Jeopardy January 08 2020
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