rarely used mercury hermology hermes venus cytherology cythera earth geology moon selenology selene mars areology ares ceres demeterology demeter jupiter zenology zeus saturn kronology kronos uranus uranology uranus neptune poseidology poseidon pluto hadeology hades eris eridology eris planetary geology best known research topics planetary geology deal planetary bodies near vicinity earth moon two neighbouring planets venus mars moon studied first using methods developed earlier earth geomorphology geomorphology studies features planetary surfaces reconstructs history
Natural science Space science Planetary science