While at work i happened to look out the windows and see an object moving slowly across the sky. the shape was not a plane, or ballong or anything i could make out. it seemed to be rotating as every now and again the sun was reflected of the surface which seemed to make it look sliver/metallic. unfortunately i was not able to follow it as i was unable to move to that part of the building to track it better. the weather at the time was sunny, blue skies with some cloud cover.