Starlike object flying at commercial jet speedI had just been watching a DVD of the movie "Stargate" (coincidence ?) and I stepped out for a cigarette. I looked up the sky since there were few shower clouds earlier. The sky was very clear, only few whispering clouds scattered. I looked up towards the Orion constellation thinking how bright the stars looked tonight, when I noticed a star as bright as Sirius, which was also visible from where I was standing, moving across the sky from the right of Orion on a straight course from S.W. to N.E. As I was trying to focus looking for the blinking lights of the airplanes I noticed it was traveling at least at 30,000 feet altitude without any sound. No blinking lights just a steady bright light, and as it went over a thin cloud it started to fade into a normal size star in the sky. When it came out from over the cloud it kept on getting dimmer although it was closer to my point of view by then. I lost sight of it behind a building.This is the 3rd incident in the past three months of witnessing an unusual flying object in this area. My first encounter, however, was in 1971 when I saw a fireball entering the atmosphere and after making a 90 degree turn it split into 4-5 smaller objects that traveled horizontally at a fantastic speed. Thanks for providing this site for all of us to report what we have seen.((NUFORC Note: The ISS passed within sight of Athens at 19:30 hrs. on this date, but it would have been to the north of the observer, not in the southern sky. PD))