IAU descriptor term
Sulci in the Solar System
Sulcus is the term planetary geologists use for a set of parallel grooves and ridges. 70 named features carry it, across 4 of the 14 mapped worlds, the largest being Mysia Sulci on Ganymede at 5,066 km.
Where they are
The largest sulci anywhere
Ranked across every mapped world, by catalogued diameter.
1Mysia SulciGanymede5,066 km2Arbela SulcusGanymede3,850 km3Phrygia SulcusGanymede3,700 km4Borsippa SulcusGanymede3,300 km5Sippar SulcusGanymede3,260 km6Babylon SulciGanymede3,100 km7Mashu SulcusGanymede2,960 km8Bubastis SulciGanymede2,730 km9Shuruppak SulcusGanymede2,730 km10Mummu SulciGanymede2,680 km11Uruk SulcusGanymede2,200 km12Xibalba SulcusGanymede2,200 km13Hursag SulcusGanymede2,183 km14Sicyon SulcusGanymede2,125 km15Apsu SulciGanymede1,950 km16Nineveh SulcusGanymede1,700 km17Lagash SulcusGanymede1,575 km18Nun SulciGanymede1,500 km19Dardanus SulcusGanymede1,500 km20Elam SulciGanymede1,500 km21Nippur SulcusGanymede1,425 km22Aquarius SulcusGanymede1,420 km23Harpagia SulcusGanymede1,400 km24Anshar SulcusGanymede1,372 km25Lycus SulciMars1,351 km26Tiamat SulcusGanymede1,330 km27Umma SulcusGanymede1,270 km28Kishar SulcusGanymede1,187 km29Ur SulcusGanymede1,145 km30Larsa SulciGanymede1,130 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 70 sulci, 11 categories appear.
Arabian20Greek13Assyro-Babylonian13Latin8Sumerian7Babylon3Egypt2Azerbaijan1