In this Thursday, Sept. 13, 2012 photo made available by NASA, the Martian moon Phobos grazes the sun's disk as seen by the Curiosity rover. Mars has two moons moving fast around the red planet, ... more 
In this Thursday, Sept. 13, 2012 photo made available by NASA, the Martian moon Phobos grazes the sun's disk as seen by the Curiosity rover. Mars has two moons moving fast around the red planet, making eclipses more common than on Earth. (AP Photo/NASA/JPL-Caltech/MSSS) less 
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Associated Press | Photo By NASA/JPL-Caltech/MSSS
Wed, Sep 19, 2012 5:55 PM EDT