In Greek mythology, a son of Ares (Mars) who, with brother Phobos, was a constant companion to his father.
One of two small moons orbiting Mars discovered in 1877 by American astronomer Asaph Hall.
the outer of two small satellites of Mars
The smaller and outermost of the planet Mars' two moons. Deimos was discovered by Asaph Hall on August 11, 1877. In Greek mythology, Deimos was the son of Ares (Mars) and Aphrodite (Venus) and was the personification of "Panic".