NASA released images of a double lunar eclipse taken by Mars rover Curiosity this month. The 41 images show the larger Phobos passing in front of Deimos on Aug. 1, to the delight of researchers studying the Martian moons. "The ultimate goal is to improve orbit knowledge enough that we can improve the measurement of the tides Phobos raises on the Martian solid surface, giving knowledge of the Martian interior," said Texas A&M University's Mark Lemmon.

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