Some nights I go stargazing and I’ve seen this shiny celestial objects which, from down here, look quite like stars, but they don’t twinkle. After staring at them for some time, I noticed that they move in a spiral, (like this–[finger moving in spiral]). First I thought they’re planets, but I’ve seen too many, too frequently. Next I thought they were satellites, but I never saw a satellite move in a spiral before. What are they?