the.com/geodesy
The science of measuring a planet that refuses to be a perfect sphere.
means The study of Earth's exact shape, size, gravity field, and how all three drift over time.
from From the Greek geodaisia, meaning division of the Earth, born when surveyors stopped guessing and started measuring.
Not a sphereEarth bulges at the equator, squashed at poles.
True shapeLumpy potato called the geoid, not a ball.
Powers GPSEvery map pin owes geodesy its accuracy.
Living planetContinents drift centimeters yearly, and geodesy clocks it.