Lily: "How many planets are in this Federation?" Picard: "Over one hundred and fifty, spread across eight thousand light years" The 150+ planets figure isn't exact, but it not overly vague either. Lily didn't ask about members, but she wouldn't have known too. What planets would Picard have been including in the number he stated? Just 150+ planets total. That's it. The combination of all Federation members and colonies and any other worlds that are a part of the Federation. 150+ Federation members. And then in addition to that number, colonies and any other worlds that are a part of the Federation. 150+ Species homeworlds. And then there would be more Federation members that aren't homeworlds (former colonies, members from other sources, etc.). Mars is a Federation member, but it isn't a species homeworld and wouldn't have been included in Picard's number. And then in addition to that, colonies and any other worlds that are a part of the Federation. Or Picard meant something else by his statement. From my reading of posts here through the years, most people seem to believe that the number is the total amount of Federation members, and so the number of species homeworlds would be less. Perhaps only a few dozen. I like the possibility that the number is just species homeworlds, with there being even more members beyond that. The total count of members could be many hundreds. Captain Kirk referred to the Federation in the twenty-third century as being "vast."