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Moons of the Solar System

Just How Many Are There?

Click to enlarge > Saturn's moon Epimetheus NASA / JPL / SSI

A whirlwind of "new moon" discoveries have kept teachers, textbooks, and web sites scrambling to keep up. In an effort to set the record straight, listed below are the number of known moons in our solar system as of March, 2009.

Named Moons

Follow the links below to find out more about the moons in the solar system that have been given names, or visit our news archives to find out the details of the discoveries of the new moons.

More about Earth's moon

More about Mars' moons: Phobos and Deimos

More about Jupiter's moons: Metis, Adrastea, Amalthea, Thebe, Io, Europa, Ganymede, Callisto, Themisto, Leda, Himalia, Lysithea, Elara, Carpo, Euporie, Orthosie, Euanthe, Thyone, Mneme, Harpalyke, Hermippe, Praxidike, Thelxinoe, Helike, Iocaste, Ananke, Eurydome, Arche, Autonoe, Pasithee, Chaldene, Kale, Isonoe, Aitne, Erinome, Taygete, Carme, Sponde, Kalyke, Pasiphae, Eukelade, Megaclite, Sinope, Hegemone, Aoede, Kallichore, Callirrhoe, Cyllene, Kore, Herse, and 12 unnamed

More about Saturn's moons: Pan, Daphnis, Atlas, Prometheus, Pandora, Epimetheus, Janus, Aegaeon, Mimas, Methone, Anthe, Pallene, Enceladus, Telesto, Tethys, Calypso, Helene, Dione, Polydeuces, Rhea, Titan, Hyperion, Iapetus, Albiorix, Bebhionn, Erriapo, Tarvos, Kiviuq, Ijiraq, Paaliaq, Siarnaq, Tarqeq, Narvi, Bestla, Skathi, Skoll, Hyrokkin, Bergelmir, Farbauti, Kari, Phoebe, Griep, Jarnsaxa, Mundilfari, Suttungr, Hati, Thrymr, Aegir, Fenrir, Surtur, Loge, Ymir, Fornjot, and 10 unnamed

More about Uranus' moons: Cordelia, Ophelia, Bianca, Cressida, Desdemona, Juliet, Portia, Rosalind, Cupid, Belinda, Perdita, Puck, Mab, Miranda, Ariel, Umbriel, Titania, Oberon, Francisco, Caliban, Stephano, Trinculo, Sycorax, Margaret, Prospero, Setebos, Ferdinand

More about Neptune's moons: Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Triton, Nereid, Halimede, Sao, Laomedeia, Psamanthe, Neso

More about Pluto's moons: Charon, Nix, Hydra