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List of plains on the Moon

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NASA photo of the near side of the Moon with prominent lunar plains numbered. Blue labels indicate sinūs while red labels indicate maria as well as the sole oceanus, Oceanus Procellarum, which is numbered one. Other lunar plains, including lacūs and paludes, are not labeled.[a]

The Moon has numerous named plains on its surface made of dark-appearing basaltic rocks. The plains are visibly prominent on the near side of the Moon because of their contrasting appearance from the surrounding lunar highlands, which are made up of anorthosite, an igneous rock containing significant concentrations of highly reflective plagioclase feldspar minerals. As with other topographical features on the Moon, the official nomenclature for lunar plains uses a Latin naming system. Due to their darker appearance, differing elevation from the highlands, and visual prominence, noted ancient Greek astronomers such as Plutarch believed the plains were water; subsequent astronomers such as Galileo Galilei and Michael van Langren built on this belief, using Latin words for water bodies in classifying them. The Latin classifications for lunar plains are oceanus (lit. 'ocean'), mare (lit. 'sea'), lacus (lit. 'lake'), palus (lit. 'marsh'), and sinus (lit. 'bay'). The largest plain is Oceanus Procellarum (transl. Ocean of Storms), covering much of the western half of the Moon's near side and the only plain to be classified as an oceanus. Most other prominent plains on the near side are the lunar maria, while the Moon's lacūs, sinūs, and paludes[b] are generally smaller and less visually prominent.

The classification of and other designations for lunar geographic features are determined by the International Astronomical Union (IAU)—the official international organization for the standardization of astronomy.[citation needed]

Geology

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In its early stages of formation, the Moon's surface was largely molten, with its deep ocean of magma persisting for roughly tens of millions to hundreds of millions of years.[2] After the cooling of the magma at the end of this period, minerals began to crystallize and differentiate, with heavier minerals sinking into the Moon's inner layers while the lighter, highly-reflective mineral of plagioclase feldspar rose to the surface and fused with other light, mafic-type crystals to form anorthosite rocks. The anorthosite accumulated to become an early stage of the Moon's outer crust. This early outer crust later became heavily bombarded by immense numbers of meteoroids and other solar system debris around 4 billion years ago, with substantial parts of the surface being blasted out to create craters and large basins. Millions of years after these massive impact basins formed, lava from the interior flowed up to the surface through cracks in the crust and filled the basins. The lava cooled into the dark, volcanic rock basalt, creating the lunar plains of today.[3]

Currently, basaltic rock, which is also fine-grained and rich in iron, magnesium, and plagioclase feldspar, makes up most of the lunar plains' composition. As with the distribution of the lunar plains, basalt is also not uniformly distributed over the surface of the Moon, with approximately 26% of the Moon's near side and only 2% of its far side composed of basalt.[3]

Nomenclature

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The modern system of Latin-based lunar nomenclature began in 1651, when Italian astronomer and Catholic priest Giovanni Battista Riccioli published Almagestum Novum, an encyclopedic work in which he and fellow Italian priest and scientist Francesco Maria Grimaldi created a detailed map of the lunar near side's surface. In the book, Riccioli introduced a system differentiating lunar topography into three categories, with dark plains comprising one category and given Latin labels for bodies of water together with poetic, abstract names. Riccioli's system was used significantly in Europe in the succeeding centuries and became the basis for the current global standard in 1935, when the IAU adopted much of Riccioli's names and conventions. Since the current IAU nomenclature rules were affirmed in 1973, new names for lunar plains have been restricted to Latin terms that describe weather and other abstract concepts. Currently, there are 5 lunar plains' names referring to sea features, 5 indicating sea attributes, and 5 expressing states of mind.

Of plains inscribed prior to 1973 by the IAU, there are four that carry non-abstract names: Mare Humboldtianum and Mare Smythii, named for German natural historian Alexander von Humboldt and British astronomer William Henry Smyth, respectively;[4][5] Mare Moscoviense, named for Muscovy, a historical predecessor of Russia;[6][7] and Sinus Lunicus, named for the Soviet space probe Luna 2 (Colloq.Tooltip Colloquially Lunik 2), which landed there in 1959.[8][9] Because Mare Humboldtianum and Mare Smythii were established before the final nomenclature, they were maintained and not required to follow the name conventions.[10] In the case of Mare Moscoviense, which was discovered by the Luna 3 and whose name was proposed by the Soviet Union, it was only accepted by the IAU with the justification that Moscow is a 'state of mind'.[11]

List

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Plains of the Moon
Name
(in Latin)[c] 		Name
(English translation) 		Diameter[d] Year[e] Quadr­angles Lunar coordinates Refs.
Mare Anguis Serpent Sea 145.99 km (90.71 mi) 1935 LAC-44 22°25′48″N 67°34′48″E / 22.43000°N 67.58000°E / 22.43000; 67.58000 (Mare Anguis) [13]
Mare Australe Southern Sea 996.84 km (619.41 mi) 1935 LAC-116 47°46′12″S 91°59′24″E / 47.77000°S 91.99000°E / -47.77000; 91.99000 (Mare Australe) [14]
Mare Cognitum Sea that has become known[f] 350.01 km (217.49 mi) 1964 LAC-76 10°31′48″S 22°18′36″W / 10.53000°S 22.31000°W / -10.53000; -22.31000 (Mare Cognitum) [15]
Mare Crisium Sea of Crises 555.92 km (345.43 mi) 1935 LAC-44 16°10′48″N 59°6′0″E / 16.18000°N 59.10000°E / 16.18000; 59.10000 (Mare Crisium) [16]
Mare Fecunditatis Sea of Fecundity 840.35 km (522.17 mi) 1935 LAC-80 7°49′48″S 53°40′12″E / 7.83000°S 53.67000°E / -7.83000; 53.67000 (Mare Fecunditatis) [17]
Mare Frigoris Sea of Cold 1,446.41 km (898.76 mi) 1935 LAC-12 57°35′24″N 0°0′36″W / 57.59000°N 0.01000°W / 57.59000; -0.01000 (Mare Frigoris) [18]
Mare Humboldtianum Sea of Humboldt 230.78 km (143.40 mi) 1935 LAC-15 56°55′12″N 81°32′24″E / 56.92000°N 81.54000°E / 56.92000; 81.54000 (Mare Humboldtianum) [4]
Mare Humorum Sea of Moisture[g] 419.67 km (260.77 mi) 1935 LAC-93 24°28′48″S 38°34′12″W / 24.48000°S 38.57000°W / -24.48000; -38.57000 (Mare Humorum) [19]
Mare Imbrium Sea of Showers 1,145.53 km (711.80 mi) 1935 LAC-24 34°43′12″N 14°54′36″W / 34.72000°N 14.91000°W / 34.72000; -14.91000 (Mare Imbrium) [20]
Mare Ingenii Sea of Cleverness 282.20 km (175.35 mi) 1961 LAC-119 33°15′0″S 164°49′48″E / 33.25000°S 164.83000°E / -33.25000; 164.83000 (Mare Ingenii) [21]
Mare Insularum Sea of Islands 511.93 km (318.10 mi) 1976 LAC-57 7°47′24″N 30°38′24″W / 7.79000°N 30.64000°W / 7.79000; -30.64000 (Mare Insularum) [22]
Mare Marginis Sea of the Edge 357.63 km (222.22 mi) 1935 LAC-63 12°42′0″N 86°31′12″E / 12.70000°N 86.52000°E / 12.70000; 86.52000 (Mare Marginis) [23]
Mare Moscoviense Sea of Muscovy[h] 275.57 km (171.23 mi) 1961 LAC-48 27°16′48″N 148°7′12″E / 27.28000°N 148.12000°E / 27.28000; 148.12000 (Mare Moscoviense) [6]
Mare Nectaris Sea of Nectar 339.39 km (210.89 mi) 1935 LAC-79 15°11′24″S 34°36′0″E / 15.19000°S 34.60000°E / -15.19000; 34.60000 (Mare Nectaris) [24]
Mare Nubium Sea of Clouds 714.50 km (443.97 mi) 1935 LAC-94 20°35′24″S 17°17′24″W / 20.59000°S 17.29000°W / -20.59000; -17.29000 (Mare Nubium) [25]
Mare Orientale Eastern sea 294.16 km (182.78 mi) 1964 LAC-108 19°52′12″S 94°40′12″W / 19.87000°S 94.67000°W / -19.87000; -94.67000 (Mare Orientale) [26]
Mare Serenitatis Sea of Serenity 674.28 km (418.98 mi) 1935 LAC-42 27°17′24″N 18°21′36″E / 27.29000°N 18.36000°E / 27.29000; 18.36000 (Mare Serenitatis) [27]
Mare Smythii Sea of Smyth 373.97 km (232.37 mi) 1935 LAC-81 1°42′36″S 87°3′0″E / 1.71000°S 87.05000°E / -1.71000; 87.05000 (Mare Smythii) [5]
Mare Spumans Foaming Sea 143.13 km (88.94 mi) 1935 LAC-62 1°18′0″N 65°18′0″E / 1.30000°N 65.30000°E / 1.30000; 65.30000 (Mare Spumans) [28]
Mare Tranquillitatis Sea of Tranquility 875.75 km (544.17 mi) 1935 LAC-61 8°21′0″N 30°49′48″E / 8.35000°N 30.83000°E / 8.35000; 30.83000 (Mare Tranquillitatis) [29]
Mare Undarum Sea of Waves 244.84 km (152.14 mi) 1935 LAC-62 7°29′24″N 68°39′36″E / 7.49000°N 68.66000°E / 7.49000; 68.66000 (Mare Undarum) [30]
Mare Vaporum Sea of Vapors 242.46 km (150.66 mi) 1935 LAC-59 13°12′0″N 4°5′24″E / 13.20000°N 4.09000°E / 13.20000; 4.09000 (Mare Vaporum) [31]
Oceanus Procellarum Ocean of Storms 2,592.24 km (1,610.74 mi) 1935 LAC-38 20°40′12″N 56°40′48″W / 20.67000°N 56.68000°W / 20.67000; -56.68000 (Oceanus Procellarum) [32]
Lacus Aestatis Lake of Summer 86.39 km (53.68 mi) 1970 LAC-74 14°49′48″S 68°34′12″W / 14.83000°S 68.57000°W / -14.83000; -68.57000 (Lacus Aestatis) [33]
Lacus Autumni Lake of Autumn 195.65 km (121.57 mi) 1970 LAC-73 11°48′36″S 83°10′12″W / 11.81000°S 83.17000°W / -11.81000; -83.17000 (Lacus Autumni) [34]
Lacus Bonitatis Lake of Goodness 122.10 km (75.87 mi) 1976 LAC-43 23°10′48″N 44°19′12″E / 23.18000°N 44.32000°E / 23.18000; 44.32000 (Lacus Bonitatis) [35]
Lacus Doloris Lake of Sorrow 102.90 km (63.94 mi) 1976 LAC-41 16°48′0″N 8°36′36″E / 16.80000°N 8.61000°E / 16.80000; 8.61000 (Lacus Doloris) [36]
Lacus Excellentiae Lake of Excellence 197.74 km (122.87 mi) 1976 LAC-110 35°39′0″S 43°34′48″W / 35.65000°S 43.58000°W / -35.65000; -43.58000 (Lacus Excellentiae) [37]
Lacus Felicitatis Lake of Happiness 98.48 km (61.19 mi) 1976 LAC-41 18°31′12″N 5°21′36″E / 18.52000°N 5.36000°E / 18.52000; 5.36000 (Lacus Felicitatis) [38]
Lacus Gaudii Lake of Joy 88.54 km (55.02 mi) 1976 LAC-42 16°19′48″N 12°16′12″E / 16.33000°N 12.27000°E / 16.33000; 12.27000 (Lacus Gaudii) [39]
Lacus Hiemalis Wintry Lake[i] 48.04 km (29.85 mi) 1976 LAC-60 15°0′36″N 13°58′12″E / 15.01000°N 13.97000°E / 15.01000; 13.97000 (Lacus Hiemalis) [40]
Lacus Lenitatis Lake of Softness 78.25 km (48.62 mi) 1976 LAC-60 14°19′12″N 12°3′0″E / 14.32000°N 12.05000°E / 14.32000; 12.05000 (Lacus Lenitatis) [41]
Lacus Luxuriae Lake of Luxury 50.61 km (31.45 mi) 1976 LAC-50 19°24′36″N 175°30′0″E / 19.41000°N 175.50000°E / 19.41000; 175.50000 (Lacus Luxuriae) [42]
Lacus Mortis Lake of Death 158.78 km (98.66 mi) 1935 LAC-26 45°7′48″N 27°19′12″E / 45.13000°N 27.32000°E / 45.13000; 27.32000 (Lacus Mortis) [43]
Lacus Oblivionis Lake of Forgetfulness 49.01 km (30.45 mi) 1976 LAC-105 20°23′24″S 168°31′12″W / 20.39000°S 168.52000°W / -20.39000; -168.52000 (Lacus Oblivionis) [44]
Lacus Odii Lake of Hatred 72.68 km (45.16 mi) 1976 LAC-41 19°13′12″N 7°16′12″E / 19.22000°N 7.27000°E / 19.22000; 7.27000 (Lacus Odii) [45]
Lacus Perseverantiae Lake of Perseverance 70.64 km (43.89 mi) 1979 LAC-62 7°50′24″N 61°55′48″E / 7.84000°N 61.93000°E / 7.84000; 61.93000 (Lacus Perseverantiae) [46]
Lacus Solitudinis Lake of Solitude 122.67 km (76.22 mi) 1976 LAC-100 27°31′12″S 103°52′48″E / 27.52000°S 103.88000°E / -27.52000; 103.88000 (Lacus Solitudinis) [47]
Lacus Somniorum Lake of Dreams 424.76 km (263.93 mi) 1935 LAC-26 37°33′36″N 30°48′0″E / 37.56000°N 30.80000°E / 37.56000; 30.80000 (Lacus Somniorum) [48]
Lacus Spei Lake of Hope 76.67 km (47.64 mi) 1976 LAC-28 43°27′36″N 65°12′0″E / 43.46000°N 65.20000°E / 43.46000; 65.20000 (Lacus Spei) [49]
Lacus Temporis Lake of Time 205.30 km (127.57 mi) 1976 LAC-27 46°46′12″N 56°12′36″E / 46.77000°N 56.21000°E / 46.77000; 56.21000 (Lacus Temporis) [50]
Lacus Tenebrarum Lake of Darkness 85.00 km (52.82 mi) 2025 LAC-144 86°42′36″S 87°40′12″W / 86.71000°S 87.67000°W / -86.71000; -87.67000 (Lacus Tenebrarum) [51]
Lacus Timoris Lake of Fear 153.65 km (95.47 mi) 1976 LAC-111 39°25′12″S 27°57′0″W / 39.42000°S 27.95000°W / -39.42000; -27.95000 (Lacus Timoris) [52]
Lacus Veris Lake of Spring 382.88 km (237.91 mi) 1970 LAC-91 16°28′48″S 85°54′36″W / 16.48000°S 85.91000°W / -16.48000; -85.91000 (Lacus Veris) [53]
Palus Epidemiarum Marsh of Epidemics 300.38 km (186.65 mi) 1935 LAC-94 32°0′0″S 27°32′24″W / 32.00000°S 27.54000°W / -32.00000; -27.54000 (Palus Epidemiarum) [54]
Palus Putredinis Marsh of Decay 180.45 km (112.13 mi) 1935 LAC-41 27°21′36″N 0°0′0″E / 27.36000°N 0.00000°E / 27.36000; 0.00000 (Palus Putredinis) [55]
Palus Somni Marsh of Sleep 163.45 km (101.56 mi) 1935 LAC-61 13°41′24″N 44°43′12″E / 13.69000°N 44.72000°E / 13.69000; 44.72000 (Palus Somni) [56]
Sinus Aestuum Seething Bay 316.50 km (196.66 mi) 1935 LAC-59 12°6′0″N 8°20′24″W / 12.10000°N 8.34000°W / 12.10000; -8.34000 (Sinus Aestuum) [57]
Sinus Amoris Bay of Love 189.10 km (117.50 mi) 1976 LAC-43 19°55′12″N 37°17′24″E / 19.92000°N 37.29000°E / 19.92000; 37.29000 (Sinus Amoris) [58]
Sinus Asperitatis Bay of Roughness 219.14 km (136.17 mi) 1976 LAC-78 5°24′36″S 27°29′24″E / 5.41000°S 27.49000°E / -5.41000; 27.49000 (Sinus Asperitatis) [59]
Sinus Concordiae Bay of Harmony 159.03 km (98.82 mi) 1976 LAC-61 10°58′48″N 42°28′12″E / 10.98000°N 42.47000°E / 10.98000; 42.47000 (Sinus Concordiae) [60]
Sinus Fidei Bay of Trust 70.70 km (43.93 mi) 1976 LAC-41 17°59′24″N 2°2′24″E / 17.99000°N 2.04000°E / 17.99000; 2.04000 (Sinus Fidei) [61]
Sinus Honoris Bay of Honor 111.61 km (69.35 mi) 1976 LAC-60 11°43′12″N 17°52′12″E / 11.72000°N 17.87000°E / 11.72000; 17.87000 (Sinus Honoris) [62]
Sinus Iridum Bay of Rainbows 249.29 km (154.90 mi) 1935 LAC-24 45°0′36″N 31°40′12″W / 45.01000°N 31.67000°W / 45.01000; -31.67000 (Sinus Iridum) [63]
Sinus Lunicus Lunik Bay 119.18 km (74.06 mi) 1970 LAC-25 32°21′36″N 1°51′0″W / 32.36000°N 1.85000°W / 32.36000; -1.85000 (Sinus Lunicus) [8]
Sinus Medii Bay of the center 286.67 km (178.13 mi) 1935 LAC-59 1°37′48″N 1°1′48″E / 1.63000°N 1.03000°E / 1.63000; 1.03000 (Sinus Medii) [64]
Sinus Roris Bay of Dew 195.04 km (121.19 mi) 1935 LAC-10 50°15′36″N 50°51′36″W / 50.26000°N 50.86000°W / 50.26000; -50.86000 (Sinus Roris) [65]
Sinus Successus Bay of Success 126.65 km (78.70 mi) 1979 LAC-62 1°7′12″N 58°31′12″E / 1.12000°N 58.52000°E / 1.12000; 58.52000 (Sinus Successus) [66]
Sinus Viscositatis Bay of Stickiness 68.00 km (42.25 mi) 2022 LAC-23 35°15′0″N 40°59′24″W / 35.25000°N 40.99000°W / 35.25000; -40.99000 (Sinus Viscositatis) [67]

Clickable map

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An equirectangular projection of the Moon using imagery taken in 1994 by the Clementine spacecraft, with the lunar plains marked and color coded by type; the lunar north pole is located at the top of the map.
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Location of lunar plains on an equirectangular projection of the Moon: Maria; Lacūs; Paludes; Sinūs; Oceanus Procellarum. The lunar north pole is located at the top of the map.

See also

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Notes

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  1. ^ In numerical order, the labeled lunar plains are: 1. Oceanus Procellarum, 2. Mare Imbrium, 3. Mare Frigoris, 4. Mare Insularum, 5. Mare Cognitum, 6. Mare Humorum, 7. Mare Nubium, 8. Mare Vaporum, 9. Mare Serenitatis, 10. Mare Tranquillitatis, 11. Mare Nectaris, 12. Mare Fecunditatis, 13. Mare Spumans, 14. Mare Undarum, 15. Mare Smythii, 16. Mare Marginis, 17. Mare Crisium, 18. Mare Anguis, 19. Mare Humboldtianum, 20. Sinus Roris, 21. Sinus Iridum, 22. Sinus Lunicus, 23. Sinus Fidei, 24. Sinus Aestuum, 25. Sinus Medii, 26. Sinus Honoris, 27. Sinus Asperitatis, 28. Sinus Concordiae, 29. Sinus Amoris, and 30. Sinus Successus.
  2. ^ The Latin plurals of mare, lacus, palus, and sinus are maria, lacūs, paludes, and sinūs, respectively.[1] In English, some sources also use lacus and sinus (without the Latin diacritics) as both the singular and plural.
  3. ^ In English, the Latin name is recognized as the formal, official title, though the English translation is used often as well.
  4. ^ The approximate diameter or longest dimension of the feature in kilometers, as indicated by the United States Geological Survey's Gazetteer of Planetary Nomenclature.[12]
  5. ^ The year in which the feature was recognized by the International Astronomical Union.
  6. ^ Also translated as the Sea of Knowledge.
  7. ^ Also translated as the Sea of Humors.
  8. ^ Also translated as the Sea of Moscow.
  9. ^ Also translated as the Lake of Winter.

References

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  1. ^ "Target: The Moon". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program. Retrieved 13 September 2025.
  2. ^ Vogel, Tracy. Saxena, Prabal; Valencia, Sarah; Bottke, Bill (eds.). "Moon Formation". NASA. Retrieved 19 September 2025. [T]he Moon had been molten during its formation and was covered with a deep ocean of magma for tens of millions to hundreds of millions of years...
  3. ^ a b "Lunar Rocks". National Air and Space Museum. Smithsonian Institution. Retrieved 19 September 2025.
  4. ^ a b "Mare Humboldtianum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  5. ^ a b "Mare Smythii". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  6. ^ a b "Mare Moscoviense". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  7. ^ Martin, Janet (26 September 2018). "Kievan Rus' and Muscovy Under the Riurikids". Oxford Research Encyclopedia of Asian History. doi:10.1093/acrefore/9780190277727.013.277. ISBN 978-0-19-027772-7. Retrieved 18 September 2025. [I]n the 15th century, those principalities coalesced to form Muscovy, the precursor of modern Russia.
  8. ^ a b "Sinus Lunicus". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  9. ^ Dutch, Steven I. (2023). "Luna 2 Becomes the First Human-Made Object to Impact on the Moon". EBSCO Information Services. Retrieved 18 September 2025.
  10. ^ "XIth General Assembly" (PDF) (in French and English). International Astronomical Union. 1961. Retrieved 26 July 2015.
  11. ^ "The name game". Nature Magazine. 488 (7412): 429. 22 August 2012. Bibcode:2012Natur.488R.429.. doi:10.1038/488429b. PMID 22914129.
  12. ^ "Specifics of the Gazetteer". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  13. ^ "Mare Anguis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  14. ^ "Mare Australe". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  15. ^ "Mare Cognitum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  16. ^ "Mare Crisium". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  17. ^ "Mare Fecunditatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  18. ^ "Mare Frigoris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  19. ^ "Mare Humorum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  20. ^ "Mare Imbrium". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  21. ^ "Mare Ingenii". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  22. ^ "Mare Insularum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  23. ^ "Mare Marginis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  24. ^ "Mare Nectaris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  25. ^ "Mare Nubium". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  26. ^ "Mare Orientale". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  27. ^ "Mare Serenitatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  28. ^ "Mare Spumans". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  29. ^ "Mare Tranquillitatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  30. ^ "Mare Undarum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  31. ^ "Mare Vaporum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  32. ^ "Oceanus Procellarum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  33. ^ "Lacus Aestatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  34. ^ "Lacus Autumni". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  35. ^ "Lacus Bonitatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  36. ^ "Lacus Doloris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  37. ^ "Lacus Excellentiae". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  38. ^ "Lacus Felicitatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  39. ^ "Lacus Gaudii". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  40. ^ "Lacus Hiemalis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  41. ^ "Lacus Lenitatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  42. ^ "Lacus Luxuriae". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  43. ^ "Lacus Mortis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  44. ^ "Lacus Oblivionis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  45. ^ "Lacus Odii". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  46. ^ "Lacus Perseverantiae". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  47. ^ "Lacus Solitudinis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  48. ^ "Lacus Somniorum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  49. ^ "Lacus Spei". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  50. ^ "Lacus Temporis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  51. ^ "Lacus Tenebrarum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  52. ^ "Lacus Timoris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  53. ^ "Lacus Veris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  54. ^ "Palus Epidemiarum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  55. ^ "Palus Putredinis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  56. ^ "Palus Somni". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  57. ^ "Sinus Aestuum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  58. ^ "Sinus Amoris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  59. ^ "Sinus Asperitatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  60. ^ "Sinus Concordiae". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  61. ^ "Sinus Fidei". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  62. ^ "Sinus Honoris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  63. ^ "Sinus Iridum". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  64. ^ "Sinus Medii". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  65. ^ "Sinus Roris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  66. ^ "Sinus Successus". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  67. ^ "Sinus Viscositatis". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
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