DOUBLE FLYBY ALERT: This morning, March 7th, space shuttle Discovery undocked from the International Space Station. This sets the stage for a spectacular series of double flyby sighting opportunities. The station and shuttle will be flying over parts of the United States and Europe tonight and tomorrow, appearing in the night sky as a closely-spaced pair of bright lights. This is also a last chance to see Discovery in flight, because the orbiter will be retired after landing in Florida on Wednesday, March 9th.
Check the Simple Satellite Tracker (http://spaceweather.com/