Well, last night there was the LUNAR ECLIPSE which I hope some people got to see, I tried but here in Manchester it was too cloudy.
I think the answer is a massive statement cocktail ring.
Now I'm not sure how many phalanges a moon dweller might have so hopefully it would accommodate their tentacles/fronds, but for "Earth humans" it sits over three fingers comfortably.
Nebula Cocktail Ring
A nebula (from Latin: "cloud") is an interstellar cloud of dust, hydrogen gas, helium gas and otherionized gases. Originally, nebula was a general name for any extended astronomical object, including galaxies beyond the Milky Way. Nebulae often form star-forming regions, such as in the Eagle Nebula.

ant nebula
So basically a space cloud that can make cities of stars.
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