Wave Motion Gun-It’s called a Stellar Converter, and it’s a spinal weapon on battleships and larger warships. It’s called a Stellar Converter because anything smaller than a battleship is going to look like a small star when it gets hit.
Using a stellar converter against planetary targets is easily a case of overkill and will leave an impressive crater that will definitely get you talked about in all the wrong ways. Even during the Horizon War, only three planets were hit by deliberate stellar converter fire. Prior to that, any planetary hits were “overshots” from targeting starships.