Zargos, Planet of Wonders

Of all the rooms and doors that you have passed none is as imposing and important seeming as this one. You use your stolen ray gun to melt the lock and go inside.

Inside is a great domed room filled with strange electrical equipment. In the middle of the room is gigantic metallic gun. It is many times larger than any artillery piece you have ever seen on Earth. It sits on a raised platform it's great muzzle pointing out a openning in the domed ceiling.

What will you do?