Can someone clarify the rule regarding the production for an operational planet. When I put 3 cards down, how can I utilize the resources on a later turn? Do I pull the card out from the planet and use it or do I just treat the resource like you do on a logistics planet? I'm guessing the former, but am unsure.
Resources under a planet are spent as if they were in your hand. They don't count towards your hand limit, but they are subject to the assembly limit.
So you basically have more options to choose from when doing an action that spends resources.
And you do remove and discard the resource when spent from a planet.