To my star-naming friend:
dictionary.com and etymonline.com lie.
They say the roots of “astronomy” are αστρον, star, and νομος, law.
I like mine better.
I always get νομος, law, confused with ονομα, which means “name.”
Thus “astronomy” becomes αστρ-ονομα, star name.
So an astronomer is one who names the stars, a Namer with a capital N in the L’Engle tradition.