When first noticed, I thought this was a star, then I noticed movement, and began watching the object,while standing in the back yard, I observed this object moving in a specific flight pattern, north, south, east, then west. I am a pilot, and this object had no identifiable aviation lights, after 20 minutes, I targeted this object with a green laser, vehicle accelerated into space, leaving a white trail, like a comet. The vehicle appeared to be at about 20 thousand feet the entire time viewed.