Some debate as to what these sensor domes actually did on a star destroyer. When one is destroyed in Return of the Jedi on the bridge of the Executor, that ship lost its bridge deflector shields. Many assumed, then, that these globes were the shield emitters for the ship's bridge. In reality, they are sensor domes. Some have suggested they serve a dual...
Inspiration coming from Ansel Hsiao's incredible "murder wedges". He's an expert in Star Destroyer design and detailing. ...