On this day in space! Aug. 17, 1877: Asaph Hall Discovers the Martian moon Phobos
On Aug. 17, 1877, American astronomer Asaph Hall discovered Mars’s moon Phobos . Moons of Mars: Amazing Photos of Phobos and Deimos Hall was working at the U.S. Naval Observatory in Washington, D.C. and looking through a 26-inch refractor telescope — which was then the largest in the world — when he first spotted theContinue Reading











