Astronomy is the naming of the stars, Astrology should rightfully be the logical study of the stars
actually, "astronomy" is the law (or regulating) of the stars. as opposed, for example, to anonymous. "nomos" is law, "onyma" is name (someday, someone will explain to me why the romans decided that the upsilon in greek ought to be transliterated as "y"). so "astronomy" isn't quite as mis-named as it appears.