Scientists Say Comet Lander May Have Shifted Position

Scientists say the Philae spacecraft that landed on a comet last year may have shifted its position, making it harder to communicate with the probe. The European Space Agency says it hasn't received data from the lander since July 9. Philae's project manager, Stephan Ulamec, said Monday the pattern of sunlight on the lander's solar panels appears to have changed, possibly due to a slight shift in position triggered by gas coming out of the comet.   One of Philae's...

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