Moons of Mars

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Phobos (top) and Deimos (bottom).
Phobos (top) and Deimos (bottom).

Mars has two little natural moons, Phobos and Deimos, which are thought to be captured asteroids.


Name and how to say
its name
Image diameter (km) Mass (kg)
Mars I Phobos /ˈfoʊbəs/
FOE-bəs
22.2 km (27×21.6×18.8) 1.08×1016
Mars II Deimos /ˈdaɪməs/
DYE-məs
12.6 km (10×12×16) 2×1015
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