I've scanned approximately 30 "Unknown systems" and come across only two "Aid the Planet" missions. One was looking for a resource other then shield generators, and the other didn't give me an option to hail the planet after I approached it, in other words, it was broken.
In my opinion, this mission should be removed from the game until the Devs can overhaul exploration clusters so they actually work. This mission only serves to frustrate, and that's not what you want new players encountering so early in the game.
In fact, in a related issue, why is there no contact or listing in the new Journal for cluster missions? Has that been phased out or something?