Why does the Empire not us the Death star long range artilory

[Jason 27]

Let face Death star planet destroy weapon ton weakness. It lack powerful effective shielding and even blow me up port vent lack shield prevent solid and weapons flying thougt. It very possible Death star shield only design protect against energy base weapons so planety destroy weapon lot more ask of. But as space artillery it long range hit target far away and star destroy and fighter simple provide protecting it deliver heavly blow enemy fleet.

[The Stair Master 101]

Hey man, fart a dookie on the roof. It'll last longer, and be more satisfying.