Asaph Hall was born October 15, 1824 in Goshen USA and died November22, 1907 in Annopolis USA.He discovered the moons of Mars. ( Deimos and Phobos ). He made his discovery in 1877, using the largest telescope in the world. He didn't only discover the moons of Mars. He also studied the orbits of double stars, the satellites of other planets, the mass of Mars and the rotation of Saturn.