Voyagers not the only deep space satellites in trouble
SATELLITE SHUTDOWN THREATENS SCIENCE INVESTIGATION
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Observations of a cosmic explosion detected by two NASA satellites have thrown into doubt one popular explanation for such explosions and have also seriously weakened the argument for yet another, according to a University of Chicago astrophysicist. But solving the mystery any time soon may be forestalled by plans to shut down one of the satellites in September.
http://spaceflightnow.com/news/n0505/31grb/