Really interesting, Tony, to think about how the symbol of chaste Diana also has overtones of perpetual change. . . . I wonder if the "sublunary" idea is relevant-- that the moon marks the border between mutable, temporary creation on earth and the eternal world of the fixed stars . . .

On the hand the moon-shell in "Adam's Curse" is associated more with entropy and vacancy than with fickleness, change, phases.

All of which is to say that this skyscape interlude is a rich passage in the poem.

(And though I try to herd people toward one another's thread-topics, I think that's fine, Tony.)