I tried to invade a planet and they appear to have planetary shields (there is a shield icon in the lower right corner of the planet). How can I bypass this? The AI has managed to develop massive beam weapons and tons of armor in a matter of a couple of years and my ships of the line are no longer the cat's meow. I can crush this empire if only I can bypass their planetary shields (or whatever is keeping my troop transports from initiating a planetary assault).
Thanks!