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The inner part of the ring formed a large moon. Gravitational interactions between this moon and the outer ring formed Phobos and Deimos. Later, the large moon crashed into Mars, but the two small moons remained in orbit. This theory agrees with the fine-grained surface of the moons and their high porosity.
Charon (/ ˈ k ɛər ɒ n,-ə n / KAIR-on, -ən or / ˈ ʃ ær ə n / SHARR-ən), [note 1] or (134340) Pluto I, is the largest of the five known natural satellites of the dwarf planet Pluto. It has a mean radius of 606 km (377 mi). Charon is the sixth-largest known trans-Neptunian object after Pluto, Eris, Haumea, Makemake, and Gonggong. [19]
Persephone and Dionysos. Roman copy after a Greek original of the 4th–3rd century B.C. Marble. Hermitage.. In ancient Greek mythology and religion, Persephone (/ p ər ˈ s ɛ f ə n iː / pər-SEF-ə-nee; Greek: Περσεφόνη, romanized: Persephónē, classical pronunciation: [per.se.pʰó.nɛː]), also called Kore (/ ˈ k ɔːr iː / KOR-ee; Greek: Κόρη, romanized: Kórē, lit.
The one known moon (at the time) of Neptune was not named for many decades. Although the name Triton was suggested in 1880 by Camille Flammarion, it did not come into general use until the mid 20th-century, and for many years was considered "unofficial". In the astronomical literature it was simply referred to as "the satellite of Neptune".
The Earth–Moon distance is not to scale. Half of the Moon's surface is always illuminated by the Sun (except during a lunar eclipse). Earth also reflects light onto the Moon, observable at times as Earthlight when it is reflected back to Earth from areas of the near side of the Moon that are not illuminated by the Sun.
The Persephone ribbon controller is also able to record pressure or velocity. The ribbon is a linear potentiometer that generates different control voltages depending on where it is touched. Thus, the modern ribbon on the Persephone replaces the nickel-chrome resistance wire used as a variable resistor to control the pitch of the trautonium 1.
Persephone gets some of the show’s most seemingly joyful moments in show-stoppers like “Our Lady of the Underground,” but even a number like that has undertones that go much, much deeper ...
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]