This is the Eclipse, from star wars. I required the huge mod to make it, and its superlaser (twin railguns) can pierce through the archangel ship in 2 shots each.
Please post your own star wars ships to this thread. it isn't a contest, though.
It can also destroy the archangel with its devastating broadsides, though it's weakness is the flank. If you have a mobile ship that can stay at the backside of the Eclipse without the Eclipse managing to hit it with its broadsides, then RIP Eclipse.
Not a moon
Its too small to be a death star.
perhaps a death asteroid?