Here were have the cutie mark artwork for one of my crystal pony adopts :) I hope it's well received.

Name Suggestions: Cygnus(this is the name of the constellation I modeled his cutie mark after, it means swan), Orion, Pyxis
The last two suggestions are also constellations so they'd work with the cutie mark as well, their constellations just weren't pretty enough for the cutie mark lol

Character suggestions: Mesmerized by the beauty in the night sky and hasn't found anything to top it. He looks like a heartthrob but he's really a nerd. He does enjoy taking care of his looks, get's that from Rarity of course, but it doesn't get in the way of his work. Spends most of his time studying the stars and has written a number of books regarding them. He's not very social, more of an introvert.