the.com/planetology
the science of judging entire worlds by their geology, and getting away with it
means The scientific study of planets and other celestial bodies — their formation, composition, surfaces, and atmospheres — treating whole worlds as objects of physical investigation.
from A modern compound stitched from "planet" and the suffix "-ology," meaning "study of." "Planet" itself comes through Latin planeta from Greek planḗtēs, "wanderer" — the ancients named these lights for their habit of drifting against the fixed stars, restless travelers of the night sky. The "-ology" half descends from Greek logos, "word, reason, account." The fused word is a 20th-century coinage, born as humans gained the instruments — and eventually the spacecraft — to treat other worlds as places rather than mere wandering points.
- young field
- Named only in the 1940s, before any probe left Earth
- cross-discipline
- Blends geology, chemistry, physics, and a little detective work
- comparative trick
- Earth's rocks decode Mars, Venus, and distant moons
- habitability hunt
- Maps which worlds could host life, present or past
- deep time
- Reads billions of years in a single layered cliff
mars reconnaissance orbiter — nasa spacecraft launched 2005, studying mars geology and climate for 18+ years
cassini-huygens mission — joint nasa-esa mission to saturn and titan from 1997-2017, discovered organic compounds on titan
lunar reconnaissance orbiter — nasa moon orbiter launched 2009, mapped entire lunar surface at 0.5m resolution