NASA's extremely successful Cassini space probe, which has deepened our understanding of Saturn, its rings, and its moons by sending back streams of terrific data, missed a chance to document another close encounter with Titan last week. Days before that event, Cassini's main computer put itself into safe mode. Program managers are unsure why.
This is the second time the computer has gone into safe mode, but engineers are confident the probe will be back gathering data shortly. They still plan to be able to use the probe for the rest of its extended mission, which runs until May, 2017.
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