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How Many Moons Does Each Planet Have?

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enotes | Valedictorian

Posted October 9, 2011 at 4:00 PM via web

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How Many Moons Does Each Planet Have?

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caledon | High School Teacher | (Level 3) Associate Educator

Posted January 19, 2014 at 4:43 AM (Answer #5)

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Our data has improved considerably in the last 20 years.

Mercury: no moons

Venus: no moons

Earth: 1 moon

Mars: 2 moons, Phobos, Deimos

Jupiter: 67 moons, some of which do not yet have proper names. The most famous are the Galilean moons, Io, Europa, Ganymede and Callisto.

Saturn: 62 moons, some of which do not yet have proper names. The most famous, by far, is Titan, which is significantly more massive than any other Saturnian moon.

Uranus: 27 moons, all of which are named after characters in the works of Shakespeare and Alexander Pope. Five are well known; Titania, Oberon, Miranda, Ariel, Umbriel

Neptune: 14 moons, the most massive by far being Triton.

While Pluto, Eris, Haumea, Orcus and Quaoar are considered dwarf planets, they nevertheless have moons.

Pluto: 5 moons, Charon, Nix, Hydra, Kerberos, Styx

Eris: 1 moon, Dysnomia

Haumea: 2 moons, Hi'iaka, Namaka

Orcus: 1 moon, Vanth

Quaoar: 1 moon, Weywot

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fact-finder | Valedictorian

Posted October 10, 2011 at 4:00 PM (Answer #1)

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All planets except Mercury and Venus have at least one moon. Saturn has the greatest number of moons—18. In 1995, the Hubble Space Telescope detected what appeared to be four additional moons of Saturn; however, that discovery has yet to be confirmed.

Planet Number of Moons Names of Moons
Mercury 0
Venus 0
Earth 1 The Moon (sometimes called Luna)
Mars 2 Phobos, Deimos
*Several other satellites have been reported but not confirmed.
Jupiter 16* Metis, Adrastea, Amalthea, Thebe, Io, Europa, Ganymede, Callisto, Leda, Himalia, Lysithia, Elara, Ananke, Carme, Pasiphae, Sinope
Saturn 18* Atlas, 1981S13 (unnamed as yet), Prometheus, Pandora, Epimetheus, Janus, Mimas, Enceladus, Ththys, Telesto, Calypso, Dione, Helene, Rhea, Titan, Hyperion, Iapetus, Phoebe
Uranus 15 Cordelia, Ophelia, Bianca, Cressida, Desdemona, Juliet, Portia, Rosalind, Belinda, Puck, Miranda, Ariel, Umbriel, Titania, Oberon
Neptune 8 Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Triton, Nereid
Pluto 1 Charon

 

Sources: Famighetti, Robert, ed. World Almanac and Book of Facts 1996, pp. 279-80; The Universal Almanac 1992, pp. 17-22.

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adarshanurag | Student , Grade 10 | Valedictorian

Posted December 1, 2013 at 7:38 AM (Answer #4)

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mercury and venus  - 0

earth and pluto - 1

mars - 2

neptune - 8

uranus - 15

saturn - 16

jupiter - 18

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