planetology
Planetology (noun) means the scientific study of planets, planetary systems, and the solar system. Example: “She studied planetology and now works on Mars rover data.”
How to use planetology
Learner’s notesIn plain EnglishThe science of planets and how they work.
It is a technical term, and the phrase planetary science is also common.
Planetology is not a countable word, so you do not say planetologies.
Trace the full origin ↓Fill the gap
Can you complete this real example?
She studied _____ and now works on Mars rover data.
Etymology
The word was formed in English from planet and the ending -ology, meaning the study of something.