Is there any canon source for Sora no Otoshimono?


In the anime, it says that Ikaros Apollon can destroy a country several times
throughout the manga. Her shield is strong enough to contain the blast.
Hephaestus, her cannon was created to be an anti-weapon and one slight mistake
could lead to the destruction of the planet.

Is there any canon source that shows if this is true because the anime
sometimes contradicts itself?

