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It's not Ursala, and I may have led us on a false trail with Ariel, but I thought Gemma was close as Ariel is one of the moons of Uranus.
Phobos and Demos are the two Martian moons.
What is always on the move but stays about 240,000 miles from us?
It has a generic name of course. They all do, but what's the name of ours?
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