Amateur Satellite Trackers Found the Army's Secret Space Plane in Orbit

The U.S. Air Force’s supersecret X-37B was launched into orbit for the fourth time last week, and amateur satellite watchers have promptly identified its secret orbit—also for the fourth time. There is, you see, a small army of amateurs who keep track of over 300 spy satellites, often with little more than a pair of binoculars.

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