Meet the Planets

This list contains all of the known planet-sized objects (including moons, etc.) in our Solar System, as well as a selection of planets discovered in other star systems throughout the Milky Way Galaxy. It contains giant, terrestrial and dwarf planets, and even select demi-planets (i.e., almost-but-not-quite-planets), but it does not include the vast majority (millions and millions) of smaller planetoids and moons that await us. Planets in our Solar System are listed in order of their average distance from the Sun. Other star systems are then listed in order of their distance from the Solar System, with exoplanets listed in order of their distance from their own stars. "Hot" planets (those that orbit too close for liquid water to form) and ones that orbit entirely within the theoretical "habitable zone" are noted wherever possible. Note that planets within the habitable zone are not necessarily habitable; they merely exist in the region where liquid water is possible under the right circumstances.



GENERAL STUFF ABOUT PLANETS

Defining "Planet"

Planet Size Classification

Planet Size Comparisons


PLANET SIZE KEY (NOTE: CLICK EACH LETTER FOR CATEGORY DEFINITION AND PICTURE GALLERY)

Giant Planets (sizes A, B, C and D)

Terrestrial Planets (sizes E, F, G and H)

Dwarf Planets (sizes I, J, K and L)

Demi-Planets (sizes M, N, O and P)

Note that many smaller Demi-Planets, as well as all Planetoids (sizes Q, R, S, T and U) and Meteoroids (sizes V–Z) have been omitted from the list below.



 


INNER SOLAR SYSTEM

Mercury – (hot) dominant terrestrial planet (size-H)

Venus – (hot) dominant terrestrial planet (size-F)

Earth – (habitable zone) dominant terrestrial planet (size-F)

     Luna – (habitable zone) satellite dwarf planet (size-I)

Mars – (habitable zone) dominant terrestrial planet (size-G) 


MAIN ASTEROID BELT

Vesta – classical demi-planet (size-M)

Metis – classical demi-planet (size-O)

Iris – classical demi-planet (size-O)

Hebe – classical demi-planet (size-O)

Fortuna – classical demi-planet (size-O)

Amphitrite – classical demi-planet (size-O)

Egeria – classical demi-planet (size-O)

Aspasia – classical demi-planet (size-O)

Prokne – classical demi-planet (size-O)

Eunomia – classical demi-planet (size-N)

Juno – classical demi-planet (size-O)

Bamberga – classical demi-planet (size-O)

Alexandra – classical demi-planet (size-O)

Elpis – classical demi-planet (size-O)

Eugenia – classical demi-planet (size-O)

Nemesis – classical demi-planet (size-O)

Daphne – classical demi-planet (size-O)

Ceres – classical dwarf planet (size-L)

Thisbe – classical demi-planet (size-O)

Herculina – classical demi-planet (size-O)

Pallas – classical demi-planet (size-M)

Gyptis – classical demi-planet (size-O)

Siegena – classical demi-planet (size-O)

Kalliope – classical demi-planet (size-O)

Psyche – classical demi-planet (size-O)

Winchester – classical demi-planet (size-O)

Aegle – classical demi-planet (size-O)

Germania – classical demi-planet (size-O)

Patientia – classical demi-planet (size-O)

Interamnia – classical demi-planet (size-N)

Diotima – classical demi-planet (size-O)

Europa Minor – classical demi-planet (size-N)

Doris – classical demi-planet (size-O)

Lachesis – classical demi-planet (size-O)

Ursula – classical demi-planet (size-O)

Elektra – classical demi-planet (size-O)

Themis – classical demi-planet (size-O)

Aletheia – classical demi-planet (size-O)

Hygiea – classical demi-planet (size-M)

Dido – classical demi-planet (size-O)

Palma – classical demi-planet (size-O)

Euphrosyne – classical demi-planet (size-N)

Aurora – classical demi-planet (size-O)

Davida – classical demi-planet (size-N)

Bertha – classical demi-planet (size-O)

Alauda – classical demi-planet (size-O)

Stereoskopia – classical demi-planet (size-O)

Pretoria – classical demi-planet (size-O)

Freia – classical demi-planet (size-O)

Cybele – classical demi-planet (size-N)

Hermione – classical demi-planet (size-O)

Sylvia – classical demi-planet (size-N)

Camilla – classical demi-planet (size-N)

Hilda – classical demi-planet (size-O)


OUTER SOLAR SYSTEM

Diomedes – Jupiter trojan demi-planet (size-O)

Jupiter – dominant giant planet (size-B)

     Amalthea – satellite demi-planet (size-O)

     Io – satellite dwarf planet (size-I)

     Europa – satellite dwarf planet (size-I)

     Ganymede – satellite terrestrial planet (size-H)

     Callisto – satellite terrestrial planet (size-H)

     Himalia – irregular satellite demi-planet (size-O)

Hektor – Jupiter trojan demi-planet (size-O)

Agamemnon – Jupiter trojan demi-planet (size-O)

Saturn – dominant giant planet (size-C)

     Epimetheus – satellite demi-planet, co-orbital with Janus (size-P)

     Janus – satellite demi-planet, co-orbital with Epimetheus (size-O)

     Mimas – satellite demi-planet (size-N)

     Enceladus – satellite demi-planet (size-M)

     Tethys – satellite dwarf planet (size-K)

     Dione – satellite dwarf planet (size-K)

     Rhea – satellite dwarf planet (size-K)

     Titan – satellite terrestrial planet (size-H)

     Hyperion – satellite demi-planet (size-N)

     Iapetus – satellite dwarf planet (size-K)

     Phoebe – retrograde irregular satellite demi-planet (size-O)

Uranus – dominant giant planet (size-D)

     Portia – satellite demi-planet (size-P)

     Puck – satellite demi-planet (size-O)

     Miranda – satellite demi-planet (size-M)

     Ariel – satellite dwarf planet (size-K)

     Umbriel – satellite dwarf planet (size-K)

     Titania – satellite dwarf planet (size-K)

     Oberon – satellite dwarf planet (size-K)

     Sycorax – retrograde irregular satellite demi-planet (size-P)

Neptune – dominant giant planet (size-D)

     Despina – satellite demi-planet (size-P)

     Galatea – satellite demi-planet (size-O)

     Larissa – satellite demi-planet (size-O)

     Proteus – satellite demi-planet (size-M)

     Triton – retrograde satellite dwarf planet (size-I)

     Nereid – irregular satellite demi-planet (size-N)

"Dorma" 2007 VL305 – Neptune trojan demi-planet (size-O)

"Namor" 2006 RJ103 – Neptune trojan demi-planet (size-O)


KUIPER BELT

"Heathcliff" 2002 XW93 – unstable demi-planet (size-M)

Orcus – “plutino” 2:3 Neptune-resonant dwarf planet (size-L)

     Vanth – satellite demi-planet (size-N)

Pluto – “plutino” 2:3 Neptune-resonant dwarf planet (size-J)

     Charon – satellite dwarf planet (size-K)

"Marmaduke" 2003 AZ84 – “plutino” 2:3 Neptune-resonant dwarf planet (size-L)

Huya – “plutino”  2:3 Neptune-resonant demi-planet (size-M)

     Huya I – satellite demi-planet (size-O)

Ixion – “plutino”2:3 Neptune-resonant dwarf planet (size-L)

"Gandalf" 2005 RN43 – “cubewano” classical dwarf planet (size-L)

"Conan" 2002 MS4 – “cubewano” classical dwarf planet (size-L)

"Optimus" 2004 GV9 – “cubewano” classical dwarf planet (size-L)

Salacia – “cubewano” classical dwarf planet (size-L)

     Actaea – satellite demi-planet (size-N)

"Ripley" 2002 UX25 – “cubewano” classical dwarf planet (size-L)

     "Newt" – satellite demi-planet (size-O)

Varuna – “cubewano” classical dwarf planet (size-L)

Haumea – 7:12 Neptune-resonant dwarf planet (size-K)

     Hi'iaka – satellite demi-planet (size-N)

     Namaka – satellite demi-planet (size-O)

Quaoar – “cubewano” classical dwarf planet (size-K)

"Zelda" 2005 UQ513 – “cubewano” classical demi-planet (size-M)

Sila – “cubewano” classical demi-planet (size-O)

     Nunam – satellite demi-planet (size-O)

"Tam" 2010 KZ39 – “cubewano” classical demi-planet (size-M)

Chaos – “cubewano” classical dwarf planet (size-L)

Makemake – “cubewano” classical dwarf planet (size-K)

Varda – “cubewano” classical dwarf planet (size-L)

     Ilmarë – satellite demi-planet (size-N)

"Knieval" 2004 XA192 – detached demi-planet (size-N)

"Organa" 2002 AW197 – “cubewano” classical dwarf planet (size-L)

"Gojira" 2007 JJ43 – “cubewano” classical dwarf planet (size-L)


OUTER REACHES OF THE SOLAR SYSTEM

"Tiberius" 2002 TC302 –  2:5 Neptune-resonant demi-planet (size-M)

"Buffy" 2004 XR190 – highly-inclined, classical demi-planet (size-M)

"Freddy" 2013 FY27 – detached dwarf planet (size-L)

"Snow White" 2007 OR10 – detached dwarf planet (size-K)

Eris – detached dwarf planet (size-J)

     Dysnomia – satellite demi-planet (size-N)

"Logan" 2007 UK126 – detached demi-planet (size-M)

     "Runner" – satellite demi-planet (size-P)

"Biden" 2012 VP113 – detached demi-planet (size-M)

Sedna – detached dwarf planet (size-L)

***

ALPHA CENTAURI SYSTEM (4.36 LIGHT YEARS AWAY)

"Sheol" Alpha Centauri Bb – (hot) terrestrial planet (size-F)

***

EPSILON ERIDANI SYSTEM (10.5 LIGHT YEARS AWAY)

Epsilon Eridani b – giant planet (size-B)

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TAU CETI SYSTEM (11.9 LIGHT YEARS AWAY)

"Aurora" Tau Ceti b – (hot) terrestrial planet (size-E)

"Constance" Tau Ceti c – (hot) terrestrial planet (size-E)

"Plateau" Tau Ceti d – (hot) terrestrial planet (size-E)

"Avalon" Tau Ceti e – (habitable zone) terrestrial planet (size-E)

"Filia" Tau Ceti f – (habitable zone) terrestrial planet (size-E)

***

GLIESE 674 SYSTEM (14.8 LIGHT YEARS AWAY)

Gliese 674 b – (hot) terrestrial planet (size-E)

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GLIESE 876 SYSTEM (15.3 LIGHT YEARS AWAY)

"Tsathoggua" Gliese 876 d – (hot) terrestrial planet (size-E)

"Hastur" Gliese 876 c– (habitable zone) giant planet (size-C)

"Cthulhu" Gliese 876 b – (habitable zone) giant planet (size-B)

"Ithaqua" Gliese 876 e – giant planet (size-D)


***

GLIESE 832 SYSTEM (16.1 LIGHT YEARS AWAY)

"Asshole Jupiter" Gliese 832 b – giant planet (size-C)

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82 G. ERIDANI SYSTEM (19.7 LIGHT YEARS AWAY)

"Rustum" 82 G. Eridani b – (hot) terrestrial planet (size-E)

"Meiji" 82 G. Eridani c – (hot) terrestrial planet (size-E)

"Muschynka" 82 G. Eridani d – (hot) terrestrial planet (size-E)

***

GLIESE 581 SYSTEM (20 LIGHT YEARS AWAY)

"Toro" Gliese 581 e – (hot) terrestrial planet (size-F)

"Zibanu" Gliese 581 b – (hot) giant planet (size-D)

"Ymir" Gliese 581 c – (hot) terrestrial planet (size-E)

*"Zoso" Gliese 581 d – (habitable zone) terrestrial planet (size-E)

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GLIESE 667 SYSTEM (23 LIGHT YEARS AWAY)

"Merope" Gliese 667 Cb – (hot) terrestrial planet (size-E)

Gliese 667 Cc – (habitable zone) terrestrial planet (size-E)

***

FOMALHAUT SYSTEM (25.13 LIGHT YEARS AWAY)

"Aslan" Fomalhaut b – giant planet (size-C)

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61 VIRGINIS SYSTEM (28 LIGHT YEARS AWAY)

61 Virginis b – (hot) terrestrial planet (size-E)

61 Virginis c – (hot) giant planet (size-D)

61 Virginis d – (hot) giant planet (size-D)

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GLIESE 785 SYSTEM (29 LIGHT YEARS AWAY)

Gliese 785 b – (habitable zone) giant planet (size-D)

Gliese 785 c – (habitable zone) giant planet (size-D)
***

GLIESE 433 SYSTEM (29 LIGHT YEARS AWAY)

Gliese 433 b – (hot) terrestrial planet (size-E)

Gliese 433 c – giant planet (size-D)

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HD 85512 SYSTEM (36 LIGHT YEARS AWAY)

"Houji" HD 85512 b – (habitable zone) terrestrial planet (size-E)

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55 CANCRI SYSTEM (41 LIGHT YEARS AWAY)

55 Cancri e – (hot) terrestrial planet (size-E)

55 Cancri b – (hot) giant planet (size-B)

55 Cancri c – (hot) giant planet (size-C)

55 Cancri f – (habitable zone) terrestrial planet (size-E)

55 Cancri d – giant planet (size-D)

***

GAMMA CEPHEI SYSTEM (45 LIGHT YEARS AWAY)

"Kong" Gamma Cephei Ab – giant planet (size-B)

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GLIESE 163 SYSTEM (49 LIGHT YEARS AWAY)

Gliese 163 b – (hot) giant planet (size-D)

Gliese 163 c – (habitable zone) terrestrial planet (size-E)

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MU ARAE SYSTEM (50 LIGHT YEARS AWAY)

Mu Arae c – (hot) giant planet (size-D)

Mu Arae b – (habitable zone) giant planet (size-C)

Mu Arae d – giant planet (size-B)

Mu Arae e – giant planet (size-B)

***
  
51 PEGASI SYSTEM (50.9 LIGHT YEARS AWAY)
"Bellerophon" 51 Pegasi b – (hot) giant planet (size-C)

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TAU BOÖTIS SYSTEM (51 LIGHT YEARS AWAY)

"Keymaster" Tau Boötis b – (hot) giant planet (size-A)

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IOTA DRACONIS SYSTEM (101.2 LIGHT YEARS AWAY)

"Kairyu" Iota Draconis b – (hot) giant planet (size-A)

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KEPLER-42 SYSTEM (126 LIGHT YEARS AWAY)

"Lashina" Kepler-42b – (hot) terrestrial planet (size-G)

"Stompa" Kepler-42c – (hot) terrestrial planet (size-G)

"Mad Harriet" Kepler-42d – (hot) terrestrial planet (size-G)

***

HD 10180 SYSTEM (127 LIGHT YEARS AWAY)

"Belar" HD 10180 b – (hot) terrestrial planet (size-F)

"Mara" HD 10180 c – (hot) giant planet (size-D)

*"Issa" HD 10180 i – (hot) terrestrial planet (size-F)

"Chaldan" HD 10180 d – (hot) giant planet (size-D)

"Torak" HD 10180 e – (hot) giant planet (size-D)

*"Eriond" HD 10180 j – (hot) terrestrial planet (size-E)

"Nedra" HD 10180 f – (hot) giant planet (size-D)

"Aldur" HD 10180 g – (habitable zone) giant planet (size-D)

"UL" HD 10180 h – giant planet (size-C)

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HR 8799 SYSTEM (129 LIGHT YEARS AWAY)
"Ikana" HR 8799 e – giant planet (size-A)

"Greatbay" HR 8799 d – giant planet (size-A)

 "Woodfall" HR 8799 c – giant planet (size-A)

 "Snowhead" HR 8799 b – giant planet (size-A)

***

HD 209458 SYSTEM (150 LIGHT YEARS AWAY)

"Osiris" HD 209458 b – giant planet (size-C)

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HD 74156 SYSTEM (211 LIGHT YEARS AWAY)

"Mayor" HD 74156 b – (hot) giant planet (size-B)

 "Dominion" HD 74156 c – giant planet (size-A)
 
***

COROT-7 SYSTEM (500 LIGHT YEARS AWAY)

"Cthugha" COROT-7b — (hot) terrestrial planet (size-E)

"Fthaggua" COROT-7c — (hot) giant planet (size-D)

*"Aphoom-Zhah" COROT-7d — (hot) giant planet (size-D)

***

HD 149026 SYSTEM (257 LIGHT YEARS AWAY)

HD 149026 b – (hot) giant planet (size-C)

***

XO-1 SYSTEM (560 LIGHT YEARS AWAY)

XO-1 b – (hot) giant planet (size-B)

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THE BEEHIVE CLUSTER (520-610 LIGHT YEARS AWAY)

"Aristaeus" Pr0201b – (hot) giant planet (size-C)

"Ah-Muzen-Cab" Pr0211b – (hot) giant planet (size-B)

***

KEPLER-22 SYSTEM (620 LIGHT YEARS AWAY)

Kepler-22b – (habitable zone) terrestrial planet (size-E)

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TrES-2 SYSTEM (718 LIGHT YEARS AWAY)

TrES-2b – (hot) giant planet (size-B)

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WASP-12 SYSTEM (870 LIGHT YEARS AWAY)

"Diablo" WASP-12b – (hot) giant planet (size-B)

***

KEPLER-20 SYSTEM (950 LIGHT YEARS AWAY)

Kepler-20b – (hot) terrestrial planet (size-E)

Kepler-20e – (hot) terrestrial planet (size-F)

Kepler-20c – (hot) giant planet (size-D)

Kepler-20f – (hot) terrestrial planet (size-F)

Kepler-20d – (hot) giant planet (size-D)

***

PSR B1257+12 SYSTEM (1,000 LIGHT YEARS AWAY)

"Pastoria" PSR B1257+12A – terrestrial planet (size-H)

"Elphaba" PSR B1257+12B – terrerstrial planet (size-E)

"Glinda" PSR B1257+12C – terrestrial planet (size-E)

***

WASP-17 SYSTEM (1,000 LIGHT YEARS AWAY)

WASP-17b – (hot) giant planet (size-C)

***

HAT-P-32 SYSTEM (1,044 LIGHT YEARS AWAY)

HAT-P-32b – (hot) giant planet (size-B)

***

HAT-P-33 SYSTEM (1,367 LIGHT YEARS AWAY)

HAT-P-33b – (hot) giant planet (size-C)

***

KEPLER-452 SYSTEM (1,400 LIGHT YEARS AWAY)

Kepler-452b – (habitable zone) terrestrial planet (size-E)

***

TrES-4 (GSC 02620-00648) SYSTEM (1,400 LIGHT YEARS AWAY)

"Gozer" TrES-4b – (hot) giant planet (size-B)

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KEPLER-11 SYSTEM (1,999 LIGHT YEARS AWAY)

"Lara" Kepler-11b – (hot) terrestrial planet (size-E)
  
"Kal" Kepler-11c – (hot) giant planet (size-D)
  
"Jor" Kepler-11d – (hot) terrestrial planet (size-E)
  
"Zor" Kepler-11e – (hot) terrestrial planet (size-E)

"Alura" Kepler-11f – (hot) terrestrial planet (size-E)

 "Kara" Kepler-11g – (hot) giant planet (size-D)


***

KEPLER-38 SYSTEM (2,000 LIGHT YEARS AWAY)

Kepler-38b – (hot) giant planet (size-D)

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KEPLER-7 SYSTEM (3,377 LIGHT YEARS AWAY)

"Tezcatlipoca" Kepler-7b – (hot) giant planet (size-C)

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V391 PEGASI SYSTEM (4,577 LIGHT YEARS AWAY)

"Shadrach" V391 Pegasi b – giant planet (size-B)


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OGLE-2006-BLG-109L SYSTEM (4,850 LIGHT YEARS AWAY)

"Aang" OGLE-2006-BLG-109Lb – giant planet (size-C)

"Korra" OGLE-2006-BLG-109Lc – giant planet (size-C)
***

KEPLER-47 SYSTEM (4,900 LIGHT YEARS AWAY)

Kepler-47b – (hot) giant planet (size-D)

Kepler-47c – (habitable zone) giant planet (size-D)

***

KEPLER-64 SYSTEM (5,000 LIGHT YEARS AWAY)

"Ensemble" Kepler-64b – (hot) giant planet (size-C)

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PSR B1620-26 SYSTEM (12,279 LIGHT YEARS AWAY)

"Methuselah" PSR B1620-26b – giant planet (size-B)

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OGLE-2005-BLG-390L SYSTEM (21,253 LIGHT YEARS AWAY)

"Crom" OGLE-2005-BLG-390Lb – terrestrial planet (size-E)



...And many more! There are an estimated 160 billion giant and terrestrial planets (not to mention dwarf planets and smaller objects) in our Milky Way Galaxy alone, and hundreds of billions more galaxies in the universe, each with billions of planets of their own, so this list is just a small sample of what's out there...

*planet suspected but as yet unconfirmed