Mars' moon Deimos is discovered by American astronomer Asaph Hall
TODAY IN HISTORY
AUGUST 12
1877 The discovery took place at the United States Naval Observatory in Washington, D.C. Deimos is one of two natural satellites of Mars. The other moon, Phobos was also discovered by Hall and is the bigger satellite of the two. Phobos is also closer to Mars than Deimos is.
D5 Creation