IAU descriptor term
Chasmata in the Solar System
Chasma is the term planetary geologists use for a deep, steep-sided canyon. 88 named features carry it, across 2 of the 14 mapped worlds, the largest being Parga Chasmata on Venus at 11,000 km.
Where they are
The largest chasmata anywhere
Ranked across every mapped world, by catalogued diameter.
1Parga ChasmataVenus11,000 km2Ganis ChasmaVenus3,700 km3Hecate ChasmaVenus3,145 km4Artemis ChasmaVenus3,087 km5Dali ChasmaVenus2,077 km6Devana ChasmaVenus2,000 km7Hanwi ChasmaVenus1,800 km8Vir ava ChasmaVenus1,700 km9Rona ChasmaVenus1,520 km10Kicheda ChasmaVenus1,500 km11Capri ChasmaMars1,472 km12Eos ChasmaMars1,306 km13Dziwica ChasmaVenus1,300 km14Xaratanga ChasmaVenus1,300 km15Zverine ChasmaVenus1,300 km16Hanghepiwi ChasmaVenus1,100 km17Tkashi mapa ChasmaVenus1,100 km18Dewi Ratih ChasmaVenus1,000 km19Britomartis ChasmaVenus1,000 km20Chondi ChasmaVenus1,000 km21Kokomikeis ChasmaVenus1,000 km22Quilla ChasmaVenus973 km23Coprates ChasmaMars958 km24Rabie ChasmaVenus950 km25Diana ChasmaVenus938 km26Juno ChasmaVenus915 km27Zewana ChasmaVenus900 km28Kuanja ChasmaVenus890 km29Ralk umgu ChasmaVenus840 km30Ius ChasmaMars840 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 88 chasmata, 38 categories appear.
Greek16Latin12Siberia5Slavic4Caucasus4Lithuania3Roman3Finland3