Energy cannon

Energy cannon is a general term applied to any type of futuristic style cannon weapon that employs unconventional ammunition. This may include concussive bursts of energy, laser technology, electromagnetic pulse energy, etc. Energy cannons feature prominently in futuristic science fiction stories such as the Star Wars multimedia franchise.

Films

 * Rogue One: A Star Wars Story - Death Star has a big honkin' space gun.
 * Star Wars Episode IV: A New Hope - Death Star has a big honkin' space gun.
 * Star Wars Episode VI: Return of the Jedi - Death Star has a big honkin' space gun.

Comics

 * X-Men Vol 2 2 - Soviets develop energy cannon to take out Asteroid M.