Moons of Mars
Videos
The two moons of Mars are Phobos and Deimos. They are irregular in shape. Both were discovered by American astronomer Asaph Hall in August 1877 and are named after the Greek mythological twin characte
Asaph Hall III, discoverer of Phobos and Deimos
The apparent sizes of the moons of Mars, Deimos and Phobos, and the Moon as viewed from the surface of their respective planets. Mars's moons as imaged by the Curiosity rover, 1 August 2013
Phobos, with Stickney Crater on the right (2003)
Comparison between Phobos (top) and Deimos (bottom) (2005)
Mars
Videos
Mars is the fourth planet from the Sun. It is also known as the "Red Planet", for its orange-red appearance. Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxi
Moons of Mars
…The two moons of Mars are Phobos and Deimos. They are irregular in shape. Both were discovered by American astronomer Asaph Hall in August 1877 and are named after the Greek…
Valles Marineris, taken by the Viking 1 probe
Artist concept showing sand-laden jets erupting from Martian geysers (published by NASA; artist: Ron Miller)
A 30 meter wide and 800 meter high dust devil. Dust devils of 20 kilometer height have been observed.
Dust devils cause twisting dark trails on the Martian surface