Well, astrology is natural and "Astral" damage is half Nature (other half arcane so you don't get locked out of your ENTIRE spellbook when interrupted on a nature spell). Also you're a MOONkin last I checked. What's near the MOON? Stars. Also the sun...which is a star.
So let's look at your spells... Oh look at that, LUNAR Strike. MOONfire. SUNfire. STARsurge. STARfall... :thinking:
You do see where I'm going with this, right? What part of this screams "arcane mage" to you, and not "nature weaver"?
Also if you were to use other forces of nature (haha, that's literally the name of a spell/talent you have too), you might be bumping into Shaman, which rather than use the aspect of "nature", they use the more destructive forms of nature: the elements. The lava from volcanoes, the tidal waves from the ocean, the lighting from thunderstorms. You must get my point by now.
ANYWAYS, OT: I would love the Bastion Owls to be a Glyph for Moonkin. If they wanted, they could make it a covenant reward recipe or something?