I go outside at night a lot , just to look up at the stars, moon, and any of the planets that may be visible at that time. at approx-11:20p.M., i was outside looking up at the clear, crisp and cold night sky, as a moving object appeared from the south, and as it came directly overhead from south to north, almost directly overhead, it appeared the object, which i had assumed to be a satellite on a polar orbit- started to what i can only describe as taking picture's, with a very, very bright flash, and continued to do so for the next few minutes almost until it was out of site- then it stopped flashing for about 15 seconds, then started again. as the object continued out of site it was still flashing, a strobe like camera's flash every few seconds. this was 1 of the strangest appearances of anything in the sky at night that i have ever seen.