Jul 20 1998
From The Space Library
The data transmission system of Galileo malfunctioned during its fifth flyby of Jupiter's moon Europa when it went into safe mode. Although NASA engineers activated a backup system, the transmission system had lost all data collected when the craft passed within 1,141 miles (1,835 kilometers) of the moon. NASA was investigating the malfunction. NASA had launched Galileo in 1989, and the probe had entered Jupiter's orbit in 1995, collecting data from moons Io, Europa, and Callisto during its initial two-year mission, completed in December 1997. NASA had extended the mission for two additional years.
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