Enhanced color image of Phobos (MRO, 23 March 2008)
Enhanced color image of Deimos (MRO, 21 February 2009)
The two moons of Mars are Phobos and Deimos.[1] They are irregular in shape.[2] Both were discovered by American astronomer Asaph Hall in August 1877[3] and are named after the Greek mythological twin characters Phobos (fear and panic) and Deimos (terror and dread) who accompanied their father Ares into battle. Ares, the god of war, was known to the Romans as Mars.
Compared to the Earth's Moon, the moons Phobos and Deimos are small. Phobos has a diameter of 22.2 km (13.8 mi) and a mass of 1.08×1016 kg, while Deimos measures 12.6 km (7.8 mi) across, with a mass of 1.5×1015 kg. Phobos orbits closer to Mars, with a semi-major axis of 9,377 km (5,827 mi) and an orbital period of 7.66 hours; while Deimos orbits farther with a semi-major axis of 23,460 km (14,580 mi) and an orbital period of 30.35 hours.
^Andrews, Robin George (25 July 2020). "Why the 'Super Weird' Moons of Mars Fascinate Scientists - What's the big deal about little Phobos and tinier Deimos?". The New York Times. Archived from the original on 25 July 2020. Retrieved 25 July 2020.
^"NASA - Under the Moons of Mars". Nasa.gov. Archived from the original on 29 March 2014. Retrieved 28 February 2013.
^Sheehan, William (1996). "Chapter 5: 1877". The Planet Mars: A History of Observation and Discovery. University of Arizona Press. Bibcode:1996pmho.book.....S. Archived from the original on 3 November 2017. Retrieved 28 February 2013.
period of 30.35 hours. Speculation about the existence of the moonsofMars had begun when the moonsof Jupiter were discovered. When Galileo Galilei (1564–1642)...
search for small moons, dust rings and old orbiters. As of 2016, there were believed to be eight derelict spacecraft in orbit around Mars (barring unforeseen...
under the title "In the MoonsofMars". However, when the first part of the serialization appeared in the February 1912 edition of The All-Story, it bore...
the two moonsofMars, Deimos and Phobos, in 1877. He determined the orbits of satellites of other planets and of double stars, the rotation of Saturn...
Martian Moons eXploration (MMX) is a robotic space probe set for launch in 2026 to bring back the first samples from Mars' largest moon Phobos. Developed...
2013. "Mars 2, 3 (Mars M71 #1, #2, #3)". "Mars 3". Retrieved 28 May 2010. Williams, David R. Dr. (18 December 2006). "Viking Mission to Mars". NASA....
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astronomer Asaph Hall and collaborated with her husband in searching for the moonsofMars, performing mathematical calculations on the data he collected. Angeline...
directly observed and photographed by astronauts is that of the Moon. The skies of Venus, Mars and Titan have been observed by space probes designed to...
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permanent base on the Moon to facilitate human missions to Mars. Two principal elements of the Artemis program are derived from the now-cancelled Constellation...
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Rei's pet crows that live at the shrine, which she named after the two moonsofMars. They have the ability to sense evil, and sometimes attack enemies....
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