Answer:
A thousand wheels, but move I do not. Call me what I am, call me a lot. What am I?
I look like a tiny trombone
You heard me before and then again. Afterward I die until you call me again.
I am a precious stone as clear as diamond. Seek me out while the sun's near the horizon. Though you can walk on water with my power try to keep me and I'll vanish in an hour.
I pass before the sun but make no shadow. What am I?
No matter how little or how much you use me, you change me every month.