Mars has two satellites, or moons, orbiting around it. Named for a group of mythological beings who lived on Mount Ida, where the infant Zeus was hidden and raised (according to some accounts) by the nymph Ida. As of December 2016, there are up to fourteen known artificial satellites in Mars' orbit, six of which are active. Beautiful daughter of Agenor, king of Tyre, she was seduced by Jupiter, who had assumed the shape of a white bull. In Greek mythology, the many-headed dog that guarded the The outer disk would create fine-grained material. Et comme pour la Terre une troisième hypothèse, la collision avec un objet céleste de grande taille suivie de la formation d'un disque de débris puis de leur rassemblement en un ou plusieurs satellites, s'est finalement imposée[19]. Science Writer: It's the first time machine learning has been used to find previously unknown craters on the Red Planet. [35] The high porosity of the interior of Phobos (based on the density of 1.88 g/cm3, voids are estimated to comprise 25 to 35 percent of Phobos' volume) is inconsistent with an asteroidal origin. The mission is the first successful Asian interplanetary mission. Les deux lunes évoluent près du plan équatorial de Mars, et Phobos est plus près que Déimos, et plus gros : il peut donc l'éclipser. University of Arizona Press", "Galileo, Kepler, & Two Anagrams: Two Wrong Solutions Turn Into Two Correct Solutions", "Galileo's Anagrams and the Moons of Mars", "Gazetteer of Planetary Nomenclature, Phobos Craers". Hall had previously seen what appeared to be a Martian moon on 10 August, but due to bad weather, he could not definitively identify them until later. Consort of Zeus and mother of Orchomenos by him. The inner part of the ring formed a large moon. Burns. Son of Hermes, brother of Pan, and decendant of the Titans. ", B. Gladman, P. Nicholson, J.A. But Hera recognized Io and sent a gadfly to torment her. Greek sea god, son of Oceanus and Tethys. Named for one of the horses that drew Mars' chariot; also called an "attendant" or "son" of Mars, according to chapter 15, line 119 of Homer's "Iliad." One of the Horae (Seasons), daughter of Zeus. Phobos, with Stickney Crater on the right (2003). suggested Phobos was a hollow metal shell, "Why the 'Super Weird' Moons of Mars Fascinate Scientists - What's the big deal about little Phobos and tinier Deimos? Hamilton, S.A. Stern, H.A. Buie, W.J. NASA's Mars 2020 Perseverance rover will peer deep below the surface with a ground-penetrating radar called RIMFAX. ", Named for the grotesque, brutish slave in Shakespeare's "The Tempest. She had as a favorite animal a goat which is said by some authors to have nourished Jupiter. ", Son of the King of Naples in "The Tempest. ", Named by Kuiper for the heroine of Shakespeare's "The Tempest. Satellites in the plutonian system are named for characters and creatures in the myths surrounding Pluto (Greek Hades) and the classical Greek and Roman Underworld. Les satellites de Mars, Phobos et Deimos. Other civilizations have named it for their god or goddess of love/war. Granddaughter of Zeus, daughter of Hephaestus and Aglaia, and sister of Eupheme. Beautiful daughter of Lycaon, she was seduced by Jupiter, who changed her into a bear to protect her from Hera's jealousy. Mars Global Surveyor en 1998 et 2003 et Mars Express en 2004 ont également fourni des données sur les satellites. « ils côtoyèrent la planète de Mars, qui, comme on sait, est cinq fois plus petite que notre petit globe ; ils virent deux lunes qui servent à cette planète », — Voltaire, Micromégas, chapitre III (1752). S.S. Sheppard, D.C. Jewitt, and J. Kleyna. 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; Deimos's semi-major axis is 23,460 km (14,580 mi) with an orbital period of 30.35 hours. Planet and Satellite Names and Discoverers. In 1959, rumors spread that Mars’s moons are […] ), Daughter of the river god Asopus. Phillips Davis ", Mischievous spirit in Shakespeare's "A Midsummer Night's Dream. Furthermore, as they had not yet been discovered, it was reasoned that they must be small and close to Mars. Searches have been conducted for additional satellites. ", Daughter of the banished duke in Shakespeare's "As You Like It. In addition Swift could have been helped in his calculations by his friend, the mathematician John Arbuthnot. Pour l'anecdote, Henry Madan, qui était professeur au collège d'Eton, est également le grand-oncle de Venetia Burney qui a suggéré le nom de Pluton en 1930. As Perseverance hurtles through space toward Mars, the six-wheeler's twin is ready to roll here on Earth. M.R. [1] They are irregular in shape. Ultimately, NASA rejected this proposal in favor of MESSENGER, a probe to Mercury. It was proven to have a twin, Epimetheus, sharing the same orbit but never actually meeting. Voltaire was presumably influenced by Swift. Curiosity has seen a lot since Aug. 5, 2012, when it first set its wheels inside the basin of Gale Crater. In 1997 and 1998, the Aladdin mission was selected as a finalist in the NASA Discovery Program. Bill Dunford. On 12 August 2005, NASA launched Mars Reconnaissance Orbiter (MRO). [36] Observations of Phobos in the thermal infrared suggest a composition containing mainly phyllosilicates, which are well known from the surface of Mars. M.E. Daughter of the Titans Oceanus and Tethys and paramour of Odysseus. [37] Both sets of findings support an origin of Phobos from material ejected by an impact on Mars that reaccreted in Martian orbit,[38] similar to the prevailing theory for the origin of Earth's moon. Named for a Gallic giant who was considered to be the king of the world. The first successful fly-by of Mars was on July 14--15, 1965, by NASA's Mariner 4. Granddaughter of Zeus, daughter of Hephaestus and Aglaia, and sister of Philophrosyne. Il s'aperçoit ainsi que Arrest avait choisi de négliger l'observation de la zone proche de la planète en utilisant des calculs qui lui indiquaient que cette zone n'était pas stable[2]. L'annonce publique a lieu le 18 août[9]. Phobos and Deimos (both found in 1877, more than a century after Swift's novel) have actual orbital distances of 1.4 and 3.5 Martian diameters, and their respective orbital periods are 7.66 and 30.35 hours. NASA's Mariner 9 reached the planet's orbit first on November 14, narrowly beating the Soviet's spacecraft amid the space race, and subsequently became the first spacecraft to orbit another planet. En août 1877, Mars est en opposition, l'astronome américain Asaph Hall découvre Déimos puis Phobos à l'aide d'un télescope de 26 pouces (66 centimètres) depuis l'observatoire naval des États-Unis de Washington[2],[6]. ScienceDaily. The name was suggested by Flammarion.

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