Moons in Our Solar System | Facts, Information, History & Definition

There are 181 known moons in our Solar System which are orbiting planets and dwarf planets. Despite there being so many moons not every planet or dwarf planet has a moon. A table of planets and dwarf planets with the number of moons is below.

Number of Moons by Planet

Planet	No. of Moons
Neptune	14
Uranus	27
Saturn	62
Jupiter	67
Mars	2
Earth	1
Venus	0
Mercury	0

Number of Moons by Dwarf Planet

Drawf Planet	No. of Moons
Eris	1
Makemake	0
Haumea	2
Ceres	0

Complete List of Moons in Our Solar System

Moon	Planet	Year Found	Discoverer	Distance from Planet (km)	Diameter (km)	Orbit (days)
Hegemone	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	24,514,095	3	781.6
Harpalyke	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	21,105,000	4.3	595
Ganymede	Jupiter	1610	Galileo	1,070,000	5276	7.155
Eurydome	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	23,219,000	3	713
Europa	Jupiter	1610	Galileo	670,900	3126	3.551
Euporie	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	19,394,000	2	534
Eukelade	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	24,557,295	4	746.4
Euanthe	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	21,017,000	3	622
Erinome	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	23,279,000	3.2	672
Elara	Jupiter	1905	C. Perrine	11,737,000	80	259.65
Cyllene	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	24,000,000	2	737.8
Chaldene	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	23,179,000	3.8	741
Carpo	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	17,100,000	3	456.5
Callirrhoe	Jupiter	2000	Spacewatch Project Minor Planet Center	24,200,000	10	774
Carme	Jupiter	1938	S. Nicholson	22,600,000	30	692
Callisto	Jupiter	1610	Galileo	1,883,000	4,800	16.689
Autonoe	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	24,122,000	4	753
Arche	Jupiter	2002	S. Sheppard	23,064,000	3	715.6
Aoede	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	23,807,655	4	748.8
Ananke	Jupiter	1951	S. Nicholson	21,200,000	20	631
Amalthea	Jupiter	1892	E. Barnard	181,300	262 X 134	0.498
Aitne	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	23,547,000	3	736
Adrastea	Jupiter	1979	Jewitt & Danielson	128,980	26 X 16	0.298
Phobos	Mars	1877	A. Hall	9,270	28 X 20	0.319
Deimos	Mars	1877	A. Hall	23,460	8	1.263
Moon (or Luna)	Earth	-	-	384,400	3,475	27.322
Dysnomia	Eris	2005	M. Brown, M. van Dam, A. Bouches, D. Le Mignant	30,000-36,000	~300	~14
Hi'iaka	Haumea	2005	H.A. Weaver, S.A. Stern, et al.	49,500	~310	49.12
Namaka	Haumea	2005	H.A. Weaver, S.A. Stern, et al.	~39,000	~170	34.7
Hydra	Ceres	2005	H.A. Weaver, S.A. Stern, et al.	64,780	44-130	38.206
Nix	Ceres	2005	H.A. Weaver, S.A. Stern, et al.	48,675	44-130	24.856
Charon	Ceres	1978	J. Christy	19,571	1,207	6.387
Triton	Neptune	1846	W. Lassel	354,800	2705	5.877
Thalassa	Neptune	1989	Voyager 2	50,000	90	0.31
Sao	Neptune	2002	M. Holman & J.J. Kavelaars	22,337,190	38	2,925.60
Psamathe	Neptune	2003	D. Jewitt, J. Kleyna & S. Sheppard	46,738,000	38	9,136.11
Proteus	Neptune	1989	Voyager 2	117,600	420	1.12
Neso	Neptune	2002	Holman & Gladman et al	47,279,670	60	9,007.10
Nereid	Neptune	1949	G. Kuiper	5,513,400	340	360.16
Naiad	Neptune	1989	Voyager 2	48,200	50	0.3
Laomedeia	Neptune	2002	M. Holman & J.J. Kavelaars	22,613,200	38	2,980.40
Larissa	Neptune	1989	Voyager 2	73,600	200	0.56
Halimede	Neptune	2002	M. Holman & J.J. Kavelaars	15,686,000	60	1,874.83
Galatea	Neptune	1989	Voyager 2	52,500	140	0.33
Despina	Neptune	1989	Voyager 2	62,000	160	0.4
Umbriel	Uranus	1851	W. Lassel	265,970	1190	4.144
Trinculo	Uranus	2001	M. Holman, J. Kavelaars & D. Milisavljevic	8,578,000	10	759
Titania	Uranus	1787	W. Herschel	435,840	1,578	8.706
Sycorax	Uranus	1997	Gladman, Nicholson, Burns, & Kavelaars	12,200,000	160	1283.39
Stephano	Uranus	1999	Kavelaars, Gladman, Holman et al	8,004,000	32	677.4
Setebos	Uranus	1999	Kavelaars, Gladman, Holman et al	17,418,000	47	2,234.80
Rosalind	Uranus	1986	Voyager 2	69,941	54	0.558
Puck	Uranus	1985	Voyager 2	86,010	154	0.762
Prospero	Uranus	1999	Kavelaars, Gladman, Holman et al	16,256,000	30	5.346
Portia	Uranus	1986	Voyager 2	66,085	108	0.513
Perdita	Uranus	1986	E. Karkoschka/Voyager 2	76,420	20	0.638
Ophelia	Uranus	1986	Voyager 2	53,440	30.4	0.3764
Oberon	Uranus	1787	W. Herschel	582,600	1526	13.463
Miranda	Uranus	1948	G. Kuiper	129,780	472	1.414
Margaret	Uranus	2003	S. Sheppard	14,688,700	11	1,694.80
Mab	Uranus	2003	M. Showalter & J. Lissauer	97,734	16	0.923
Juliet	Uranus	1986	Voyager 2	64,360	84	0.493
Francisco	Uranus	2001	M. Holman & B. Gladman et al	4,276,000	22	266.6
Ferdinand	Uranus	2001	M. Holman & B. Gladman et al	20,901,000	21	2,823.40
Desdemona	Uranus	1986	Voyager 2	62,660	54	0.474
Cupid	Uranus	2003	M. Showalter & J. Lissauer	74,800	12	0.618
Cressida	Uranus	1986	Voyager 2	61,770	62	0.464
Cordelia	Uranus	1986	Voyager 2	49,750	26	0.335
Caliban	Uranus	1997	Gladman, Nicholson, Burns, & Kavelaars	7,200,000	80	579.5
Bianca	Uranus	1986	Voyager 2	75,260	42	0.433
Belinda	Uranus	1986	Voyager 2	75,260	66	0.624
Ariel	Uranus	1851	W. Lassell	191,240	1160	2.52
Ymir	Saturn	2000	Intl. Team of 8 Astronomers	23,096,000	20	1312.37
Titan	Saturn	1655	C. Huygens	1,221,850	5150	15.945
Thrymr	Saturn	2000	Intl. Team of 8 Astronomers	20,470,000	7	1088.89
Tethys	Saturn	1684	G. Cassini	294,660	1060	1.888
Telesto	Saturn	1980	B. Smith	294,660	30 X 16	1.888
Tarvos	Saturn	2000	Intl. Team of 8 Astronomers	18,239,000	16	925.7
Tarqeq	Saturn	2007	S. Sheppard, D. Jewitt, J. Kleyna	18,009,000	7	887.5
S/2007 S3	Saturn	2007	S. Sheppard, D. Jewitt, J. Kleyna	20,518,500	5	1,100
S/2007 S2	Saturn	2007	S. Sheppard, D. Jewitt, J. Kleyna	16,560,000	6	800
S/2006 S3	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	21,132,000	6	1,142
S/2006 S1	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	18,981,135	6	970
S/2004 S17	Saturn	2004	D. Jewitt, S. Sheppard, J. Kleyna	18,600,000	4	986
S/2004 S13	Saturn	2004	D. Jewitt, S. Sheppard, J. Kleyna	18,450,000	6	906
S/2004 S12	Saturn	2004	D. Jewitt, S. Sheppard, J. Kleyna	19,650,000	5	1,048
S/2004 S07	Saturn	2004	D. Jewitt, S. Sheppard, J. Kleyna	19,800,000	6	1,103
Suttungr	Saturn	2000	Gladman et al.	19,470,000	7	1016.8
Surtur	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	22,707,000	6	1,297.70
Skoll	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	17,665,000	6	878.3
Skathi	Saturn	2000	Intl. Team of 8 Astronomers	15,645,000	8	728.93
Siarnaq	Saturn	2000	Intl. Team of 8 Astronomers	18,160,000	45	893.07
Rhea	Saturn	1672	G. Cassini	527,040	1528	4.518
Prometheus	Saturn	1980	S. Collins	139,350	148 X 68	0.613
Polydeuces	Saturn	2004	C.C. Porco et al./Cassini	377,400	4	2.74
Phoebe	Saturn	1898	W. Pickering	12,952,000	220	550.48
Pandora	Saturn	1980	S. Collins	141,700	110 X 62	0.629
Pan	Saturn	1990	M. Showalter	133,630	19.32	0.575
Pallene	Saturn	2004	C.C. Porco et al./Cassini	211,000	4	1.14
Paaliaq	Saturn	2000	Intl. Team of 8 Astronomers	15,199,000	25	686.92
Narvi	Saturn	2003	Scott S. Sheppard, David Jewitt, and Jan Kleyna	18,719,000	8	956.2
Mundilfari	Saturn	2000	Intl. Team of 8 Astronomers	18,709,000	7	951.38
Mimas	Saturn	1789	W. Herschel	185,520	398	0.942
Methone	Saturn	2004	C.C. Porco et al./Cassini	194,000	3	1.01
Loge	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	23,065,000	6	1,312.00
Kiviuq	Saturn	2000	Intl. Team of 8 Astronomers	11,365,000	17	449.22
Kari	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	22,118,000	7	1,233.60
Jarnsaxa	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	18,811,000	6	964.7
Janus	Saturn	1966	A. Dollfus	151,472	190 X 154	0.695
Ijiraq	Saturn	2000	Intl. Team of 8 Astronomers	11,440,000	14	451.48
Iapetus	Saturn	1671	G. Cassini	3,561,300	1436	79.3215
Hyrokkin	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	18,437,000	8	931.8
Hyperion	Saturn	1848	W. Bond	1,481,000	360 X 226	21.277
Helene	Saturn	1980	Laques & Lecacheux	377,400	36 X 28	2.737
Hati	Saturn	2005	D. Jewitt, S. Sheppard, J. Kleyna	19,856,000	6	1,038.70
Greip	Saturn	2006	S. Sheppard, D. Jewitt, J. Kleyna	18,206,000	6	921.2
Fornjot	Saturn	2005	D. Jewitt, S. Sheppard, J. Kleyna	25,108,000	6	1,490.90
Fenrir	Saturn	2005	D. Jewitt, S. Sheppard, J. Kleyna	22,453,000	4	1,260.30
Farbauti	Saturn	2005	D. Jewitt, S. Sheppard, J. Kleyna	20,390,000	5	1,086.10
Erriapo	Saturn	2000	Intl. Team of 8 Astronomers	17,611,000	10	871.17
Epimetheus	Saturn	1966	R. Walker	151,422	138 X 110	0.694
Enceladus	Saturn	1789	W. Herschel	238,020	498	1.37
Dione	Saturn	1684	G. Cassini	377,400	1120	2.737
Daphnis	Saturn	2005	Cassini Imaging Science Team	136,500	7	0.594
Calypso	Saturn	1980	B. Smith	294,660	30 X 16	1.888
Bestla	Saturn	2005	D. Jewitt, S. Sheppard, J. Kleyna	20,129,000	7	1,083.60
Bergelmir	Saturn	2005	D. Jewitt, S. Sheppard, J. Kleyna	19,338,000	6	1,005.90
Bebhionn	Saturn	2005	D. Jewitt, S. Sheppard, J. Kleyna	17,119,000	6	834.8
Atlas	Saturn	1980	R. Terrile	137,640	37 X 27	0.602
Anthe	Saturn	2004	Cassini Imaging Team	197,700	1	1.04
Albiorix	Saturn	2000	Gladman et al.	16,392,000	30	783
Aegir	Saturn	2005	D. Jewitt, S. Sheppard, J. Kleyna	20,735,000	6	1,116.50
Thyone	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	21,312,000	4	615
Themisto	Jupiter	1975	C. Kowal & E. Roemer	7,507,000	8	130.07
Thelxinoe	Jupiter	2003	Scott S. Sheppard & B. Gladman	21,162,000	2	628.09
Thebe	Jupiter	1979	S. Synnott	221,900	100	0.675
Taygete	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	23,360,000	5	687
S/2003 J 23	Jupiter	2003	Scott S. Sheppard	23,563,000	2	732.44
S/2003 J19	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	22,800,000	2	701.3
S/2003 J18	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	20,700,000	2	606.3
S/2003 J17	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	22,000,000	2	690.3
S/2003 J16	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	21,000,000	2	595.4
S/2003 J15	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	22,000,000	2	668.4
S/2003 J12	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	19,002,480	1	533.3
S/2003 J10	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	24,249,600	2	767
S/2003 J9	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	22,441,680	1	683
S/2003 J5	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	24,084,180	4	759.7
S/2003 J4	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	23,257,920	2	723.2
S/2003 J3	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	18,339,885	2	504
S/2003 J2	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	28,570,410	2	982.5
S/2000 J11	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	12,555,000	4	284.3
Sponde	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	23,808,000	2	732
Sinope	Jupiter	1914	S. Nicholson	23,700,700	28	758
Praxidike	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	21,147,000	6.8	632
Pasithee	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	23,029,000	2	715
Pasiphae	Jupiter	1908	P. Melotte	23,500,000	36	735
Orthosie	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	21,168,000	2	617
Mneme	Jupiter	2003	Scott S. Sheppard & B. Gladman	21,069,000	2	620.04
Metis	Jupiter	1979	S. Sunnott	127,960	40	0.295
Magaclite	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	23,806,000	5.4	771
Lysithea	Jupiter	1938	S. Nicholson	11,720,000	24	259.22
Leda	Jupiter	1974	C. Kowal	11,094,000	10	238.72
Kore	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	24,543,000	2	779.2
Kalyke	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	23,583,000	5.2	760
Kallichore	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	22,395,390	2	683
Kale	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	23,124,000	2	609
Isonone	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	23,217,000	3.8	712
Iocaste	Jupiter	2000	S. Sheppard, D. Jewitt, Y. Fernandez, & G. Magnier	21,269,000	5.2	657
Io	Jupiter	1610	Galileo	421,600	3,629	1.769
Himalia	Jupiter	1904	C. Perrine	11,480,000	170	250.57
Hermippe	Jupiter	2001	S. Sheppard, D. Jewitt, & J. Kleyna	21,252,000	4	630
Helike	Jupiter	2003	S. Sheppard, D. Jewitt, & J. Kleyna	10,972,830	4	233.8