1/2/2000 Aegean SeaI was on the Aegean Sea on a Renaissance Cruise ship, was out on my personal balcony looking at the sea and stars about 2 a.m. I noticed 10-12 lights very high in the sky moving left to right. The were moving at various speeds, slower and faster doing things that normal aircraft don't do. It looked like they were playing tag even circling around each other, like an infinity symbol. They also moved right to left. After watching this for a few minutes I said to myself, okay, I am not seeing this. I went inside for a few minutes to calm down after what I had seen and knew absolutely I had seen something extraordinary, went back out on my balcony, the craft were still out there. I had nothing to drink or anything else that would alter my perception.