You've neglected the very top left hand corner of the planet which kind of breaks the form for me. But i'm just being picky :p Also i'm not sure if I like the soft edge on the planet looks correct or not. Perhaps still soft but not that much.
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Armor design I made. The figure/face doesn't do it any favours though :/ was going for a moon theme, thought the moon-like hooks being used to hold straps would be cool.