I went to fire my Novalith cannon last night as TEC and received a message saying that it was necessary to have explored the target planet first. What exactly is required? Is it enough to have merely had a scout or any ship pass through the target gravity well at some point or does it need to have been recently explored? If it needs to have been recently explored, then how recently? Is an implication of this that a TEC should always have one or two scouts set to auto-explore for the entire game to insure that all systems have been explored for the Novalith?