User blog comment:Void Samukai/Tenelapis/@comment-10905876-20150508144623/@comment-25373667-20150508202926

Quoting Mace here:

"Nukes are much less effective in space."

End of story. You dropped a Tsar Bomba in space, which would do considerably less damage than on the ground, with a Sith fleet in a spread out formation. You aren't going to damage every ship in the fleet so badly that it can't warp.