Deimos (moon) - Wikipedia
Deimos (/ ˈ d aɪ m ə s /; systematic designation: Mars II) [11] is the smaller and outer of the two natural satellites of Mars, the other being Phobos. Deimos has a mean radius of 6.2 km (3.9 mi) and takes 30.3 hours to orbit Mars. [5] Deimos is 23,460 km (14,580 mi) from Mars, much farther than Mars's other moon, Phobos. [12]
Moons of Mars - Wikipedia
The moons of Mars may have started with a huge collision with a protoplanet one third the mass of Mars that formed a ring around Mars. The inner part of the ring formed a large moon. Gravitational interactions between this moon and the outer ring formed Phobos and Deimos.
Deimos - NASA Science
Deimos orbits Mars every 30 hours. Deimos is the smaller of the two Martian moons and is less irregular in shape. The largest crater on Deimos is approximately 1.4 miles (2.3 km) in diameter, 1/5 the size of the largest crater on Phobos.
Moons of Mars - Science@NASA
Deimos is the smaller moon. It orbits Mars every 30 hours. Phobos is on a collision course with Mars. Deimos is a small and lumpy, heavily cratered object. Mars has two moons, Phobos and Deimos. Both are thought to be captured asteroids, or …
Deimos | Orbit, Size & Facts | Britannica - Encyclopedia Britannica
Deimos, the outer and smaller of Mars’s two moons. It was discovered telescopically with its companion moon, Phobos, by the American astronomer Asaph Hall in 1877 and named for one of the sons of Ares, the Greek counterpart of the Roman god Mars.
Deimos: Mars' smallest moon | Space
Dec 8, 2017 · Deimos is Mars' outer moon. It's a tiny, irregularly shaped moon and smaller than Mars' other moon, Phobos. Despite being unspectacular, Deimos remains a fascinating mystery. What is...
Mars Moons: Facts - Science@NASA
Mars' moons are among the smallest in the solar system. Phobos is a bit larger than Deimos, and orbits only 3,700 miles (6,000 kilometers) above the Martian surface. No known moon orbits closer to its planet. It whips around Mars three times a day, while the more distant Deimos takes 30 hours for each orbit.
ESA Science & Technology - Martian moon: Deimos
Sep 1, 2019 · The Martian moon Deimos was discovered, shortly before its larger companion, Phobos, by Asaph Hall at the Naval Observatory in Washington DC in August 1877. Deimos means 'terror' or 'panic' and is named after one of the sons of Ares, the Greek god of war.
Deimos (moon) - Simple English Wikipedia, the free encyclopedia
The Soviet Phobos program sent two probes to Phobos. In case Phobos 1 succeeded, Phobos 2 could have been sent to Deimos. Both probes launched successfully in July 1988. In 1997 and 1998, the proposed Aladdin mission was selected. The plan was to visit both Phobos and Deimos, and launch projectiles at the satellites.The probe would collect the dust kicked into space as it made a slow flyby.
See the First Detailed Close-Ups of Mars’ Moon Deimos
Apr 26, 2023 · Deimos is the smaller of Mars’ two moons, measuring just 9 by 7 by 6.8 miles, per NASA. The other, Phobos is a bit larger, at 17 by 14 by 11 miles. Phobos has been well-studied in the past...
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