IAU descriptor term
Fluctus in the Solar System
Fluctus is the term planetary geologists use for a flow of erupted material. 81 named features carry it, across 4 of the 14 mapped worlds, the largest being Vut Ami Fluctus on Venus at 1,300 km.
Where they are
The largest fluctus anywhere
Ranked across every mapped world, by catalogued diameter.
1Vut Ami FluctusVenus1,300 km2Mylitta FluctusVenus1,250 km3Mortim Ekva FluctusVenus1,250 km4Kaiwan FluctusVenus1,200 km5Bolotnitsa FluctusVenus1,100 km6Ningyo FluctusVenus970 km7Argimpasa FluctusVenus950 km8Ney Anki FluctusVenus950 km9Juturna FluctusVenus900 km10Ilaheva FluctusVenus900 km11Itoki FluctusVenus900 km12Mamapacha FluctusVenus900 km13Oilule FluctusVenus900 km14Syvne FluctusVenus900 km15Kasogonaga FluctusVenus850 km16Nambubi FluctusVenus850 km17Cavillaca FluctusVenus800 km18Tsunghi FluctusVenus800 km19Tantalus FluctusMars794 km20Darago FluctusVenus775 km21Praurime FluctusVenus750 km22Rafara FluctusVenus700 km23Sobra FluctusVenus700 km24Uilata FluctusVenus700 km25Uzume FluctusVenus700 km26Merisa FluctusVenus630 km27Arubani FluctusVenus620 km28Galaxias FluctusMars607 km29Eriu FluctusVenus600 km30Hikuleo FluctusVenus600 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 81 fluctus, 56 categories appear.
Egypt6Japan5Siberia4Roman3Indonesia3China3Tonga2Nicaragua2