Very bright light slowly moved around in a circle, then streaked and faded--not a plane or star.My son and I were outside looking at the stars at our cabin near Mt. Baker in WA. The sky was very dark and we could see a patch of the sky through the trees. We were setting up a small telescope and talking when the super bright light appeared. It was right next to what we thought was a planet (as it was very bright). I did not notice the moving light before but now it was brighter than the planet. It was moving slowly in a circular motion and definitely was not an airplane. It was going back and forth and then started to fade and went in a line away from the planet and we lost it in the trees. I was still going when we lost it. We did not see it with the telescope and we could not get a picture of it, as it was too far away.