Tranquility is a golden city on the Moon where the Moonlanders live in the 2017 series DuckTales .
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Tranquility is first seen during the events of "What Ever Happened to Della Duck?!". This golden colored city on the dark side of the Moon has long been obscured from Earth's view by a hologram. Moon Mites raid the city only to find gold to feed their babies. Tranquility is known for its abundance of gold and advanced technology. It later reveals it has a prison, as shown in "What Ever Happened to Donald Duck?!"