This is something that is fixed in a pre-release I am pretty sure, but I found it kind of funny
Am playing a new game on an 80 planet map (Simple Hubs, Easy Random 5 x 2) and when looking at the planetary overview I found that there are apparently 10 phantom planets hanging around!
Just wanted to share a random oddity :p - isn't game breaking and is already fixed if I remember right (not running pre-release, stock Steam 2.0) [and yes, I am sure I selected 80 planets on game creation]