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Asaph Hall and the Moons of Mars

06/27/2004 12:00AM

Asaph Hall and the Moons of Mars

From the News Archives: On a sultry August night in 1877, U. S. Naval Observatory astronomer Asaph Hall discovered the two moons of Mars, Phobos and Deimos, using the Observatory's 26-inch "Great Equatorial" refracting telescope (by Alvin Clark), then the largest of its kind in the world.


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