Satellite flares: While the Sun is not far below the horizon, artificial satellites orbiting high above the Earth may be seen due to reflected sunlight.One particularly famous example, which fooled NASA for a while, occurred in 2003 and was related to Concorde – for more info, see original report and image and concorde explanation . The long reported durations, often in excess of a minute are a further clue. Their locations low in the east near sunrise or low in the west near sunset are good reasons to be cautious. However, when the Sun is close to the horizon and illuminating them from below, observers sometimes mistake contrails for fireballs or their glowing persistant trains.
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