asaph hall
- n United States astronomer who discovered Phobos and Deimos (the two satellites of Mars) (1829-1907)
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- This date in science: Asaph Hall discovers a moon for Mars
American astronomer Asaph Hall discovered Phobos, one of the two Martian moons, on this date in 1877. Did he imagine how well we'd see Mars' moons today?
Aug. 17, 2013 - EarthSky