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ALERT REGARDING SPACE SHUTTLE, “DISCOVERY,” AND INTERNATIONAL SPACE STATION
Every time the space shuttle either approaches, or departs from, the International Space Station, NUFORC receives many reports of two “UFO’s” flying in tandem in the night sky. Please note that the space shuttle, “Discovery,” is scheduled to undock from the ISS at 07:42 hrs. (Eastern?), on Wednesday morning, June 11, and they will be seen very prominently in the night sky, passing overhead in proximity to one another, for the next several days. They are not UFO’s.
Definition of "magnitude"
This is a measure of the brightness of a celestial object. The lower the value, the brighter the object, so magnitude -4 is brighter than magnitude 0, which is in turn brighter than magnitude +4. The scale is logarithmic, and a difference of 5 magnitudes means a brightness difference of exactly 100 times. A difference of one magnitude corresponds to a brightness difference of around 2.51 (the fifth root of 100).