The proton bomb, space bomb, or heavy space bomb, was a large energy explosive device used in space combat and orbital bombardment. They were most effective against fixed or slow moving targets such as fortifications, space stations, and capital ships. These energy weapons often emitted the signature blue "glow" of proton torpedoes. Handheld explosives were termed proton grenades.
At the end of the Activation Phase, this device detonates.