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The center of the earth is not straight down

35 · John Cook · Dec. 29, 2025, 11:38 a.m.
Math Geodesy Earth Science Physics Geometry Gravity
Summary
The post explains how the direction of 'down' is influenced by the Earth's shape, highlighting the difference between true downwards direction towards the center and the practical perception of down due to the planet's flattening at the poles.
Read full post on www.johndcook.com →
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