Awesome! I think I'll go purchase a half-dozen Yavin things and make grenades out of them. Then I'll throw 'em at my neighbors and ask them on how authentic it looks (kidding). Just to be technical, the M9, being a "frag" grenade, usually has "pineapple bumps" instead of a smooth sphere. ...Not like you could do that without modifying the globe or something. Anyway, great job.
I have absolutely no knowledge of Halo, but I commend you for finding a use for a Planet Set sphere other than the Death Star. Not that there is anything wrong with the Death Star, but I wanted to see somebody use something else for once. Looks cool, and nice ingenuity.