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Deimos
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Deimos, the outer and smaller of the two known moons of Mars, photographed by the Viking 2 orbiter in October 1977 from a distance of about 1,400 km (870 miles). Although scarred with impact craters, Deimos appears smoother than its companion moon, Phobos, because it is covered with a thick layer of fine rocky debris (regolith).
Mars's moons explained
Gaspra, Deimos, and Phobos compared Mars: moons Phobos and Deimos
Quizzes
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
Saturn. Saturn and its rings. Second largest planet of the solar system. Space Art
Planets and the Earth’s Moon
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
Buzz Aldrin. Apollo 11. Apollo 11 astronaut Edwin Aldrin, photographed July 20, 1969, during the first manned mission to the Moon's surface. Reflected in Aldrin's faceplate is the Lunar Module and astronaut Neil Armstrong, who took the picture.
Can You Match The Moon To Its Planet? Quiz
Related Questions
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Mars rover. Mars Pathfinder. NASA. Sojourner.
10 Important Dates in Mars History
Solar system illustration. (Sun; planets)
A Model of the Cosmos
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Discover
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Deimos: Related Content

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News •

Mars Moons Phobos And Deimos Are Not Captured Asteroids, Says Paper • Mar. 31, 2025, 11:41 PM ET (Forbes)

Photos and Videos

Deimos, the outer and smaller of the two known moons of Mars, photographed by the Viking 2 orbiter in October 1977 from a distance of about 1,400 km (870 miles). Although scarred with impact craters, Deimos appears smoother than its companion moon, Phobos, because it is covered with a thick layer of fine rocky debris (regolith).
Gaspra, Deimos, and Phobos compared
Mars: moons Phobos and Deimos
Mars's moons explained
See All Videos and Images →

Related Topics and References

Topics

Related Quizzes and Features

Quiz
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
Saturn. Saturn and its rings. Second largest planet of the solar system. Space Art
Planets and the Earth’s Moon
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
Buzz Aldrin. Apollo 11. Apollo 11 astronaut Edwin Aldrin, photographed July 20, 1969, during the first manned mission to the Moon's surface. Reflected in Aldrin's faceplate is the Lunar Module and astronaut Neil Armstrong, who took the picture.
Can You Match The Moon To Its Planet? Quiz
List
Mars rover. Mars Pathfinder. NASA. Sojourner.
10 Important Dates in Mars History
Demystified
Colorful winter sunset
What's the Difference Between a Solstice and an Equinox?