Credit: HiRISE, MRO, LPL (U. Arizona), NASA
Stickney Crater, the largest crater on the martian moon Phobos, is named for Chloe Angeline Stickney Hall, mathematician and wife of astronomer Asaph Hall.
Asaph Hall discovered both the Red Planet's moons in 1877.
Astronmomy Picture of the Day
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