Chemical-propelled projectiles - aka firearms and missiles - were known on Earth for centuries and are still widely used; the Star Gods see little threat in those. It is quite widely known among the more learned that there exist three groups of more advanced weapons. The least powerful of those are Laser weapons, supposedly developed on Earth around the time it was conquered. Laser weapons ignore 1/3rd of armor. More powerful and less common are Gauss weapons, of uncertain origin. They were designed for a race stronger than humans. These have code locks and cannot be used straight away. The third group, Plasma weapons, genuine weaponry of the Star Gods, requires even more arcane understanding... This is about as much as we learned by scratching the surface of the problem.