IAU descriptor term
Planitiae in the Solar System
Planitia is the term planetary geologists use for a low plain. 83 named features carry it, across 9 of the 14 mapped worlds, the largest being Guinevere Planitia on Venus at 7,520 km.
Where they are
Venuslargest: Guinevere Planitia, 7,520 km41Mercurylargest: Borealis Planitia, 3,450 km16Marslargest: Utopia Planitia, 3,560 km10Titanlargest: Caladan Planitia, 2,800 km10Enceladuslargest: Diyar Planitia, 325 km2The Moon1Phoboslargest: Lagado Planitia, 4 km1Vestalargest: Feralia Planitia, 270 km1Cereslargest: Vendimia Planitia, 750 km1
The largest planitiae anywhere
Ranked across every mapped world, by catalogued diameter.
1Guinevere PlanitiaVenus7,520 km2Ganiki PlanitiaVenus5,160 km3Niobe PlanitiaVenus5,008 km4Aino PlanitiaVenus4,985 km5Helen PlanitiaVenus4,360 km6Kawelu PlanitiaVenus3,910 km7Bereghinya PlanitiaVenus3,900 km8Hinemoa PlanitiaVenus3,700 km9Rusalka PlanitiaVenus3,600 km10Sedna PlanitiaVenus3,570 km11Utopia PlanitiaMars3,560 km12Acidalia PlanitiaMars3,505 km13Borealis PlanitiaMercury3,450 km14Elysium PlanitiaMars3,001 km15Fonueha PlanitiaVenus3,000 km16Tahmina PlanitiaVenus3,000 km17Leda PlanitiaVenus2,890 km18Lavinia PlanitiaVenus2,820 km19Amazonis PlanitiaMars2,809 km20Dzerassa PlanitiaVenus2,800 km21Undine PlanitiaVenus2,800 km22Caladan PlanitiaTitan2,800 km23Snegurochka PlanitiaVenus2,775 km24Akhtamar PlanitiaVenus2,700 km25Lowana PlanitiaVenus2,700 km26Llorona PlanitiaVenus2,600 km27Wawalag PlanitiaVenus2,600 km28Tinatin PlanitiaVenus2,500 km29Louhi PlanitiaVenus2,440 km30Tilli Hanum PlanitiaVenus2,300 km
What they are named after
Naming themes are set per world, so one descriptor can draw on very different sources depending on where it sits. Across all 83 planitiae, 45 categories appear.
Greek13United States10Latin5Arabian3Finland3Ireland2New Zealand2Slavic2