Coroscant's planets were all behind his HW which was connected to my #10 planet and at one point early in the game, Coroscant had colonized my #10 planet as well. But I used my superior knowledge of his HW location to safely Pop Trick with HW, 20,24, 22,23 and 22,22. Coroscant never got past 21,23. Next, I overbuilt colony ships to complete my colonization. I then rapidly nuked and took back my #10 planet while terraforming as much as possible to get my resources maxed out as fast as possible. I built a commanding 12 to 9 econ lead and nuked him with 11 ships to 6 defenders.