How many moons does Mars have?
Mars has two moons, they were named Phobos and Deimos by the American astronomer Asaph Hall, who discovered them in August 1877.
<START_INST>How many moons does Mars have?<END_INST><START_CTX><END_CTX><START_A>Mars has two moons, they were named Phobos and Deimos by the American astronomer Asaph Hall, who discovered them in August 1877.<END_A>