Is the Earth a perfect sphere or something more like a peanut?
In short: We assume planets are spherical, but gravity's true influence is more complex. This lecture by mathematician Alain Goriely explores whether extreme forces could force larger celestial bodies into unexpected shapes, moving beyond the simple geometry we take for granted.
In this Gresham College lecture, Alain Goriely examines the mathematical tension between gravity and planetary shape. While we often view planets as perfect spheres, the Earth is actually slightly squashed. The presentation investigates whether this deformation resembles a pumpkin or a peanut, and whether the sphere remains the only possible shape as planets grow larger and must withstand increasingly extreme forces.
The discussion draws on profound mathematical theories that have fascinated scientists since the era of Newton. By exploring the mechanics of gravity, the lecture delves into the fundamental questions of how mass and force dictate the architecture of the universe.
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- Summary by Intellect · source: The Shape of Gravity: Why On Earth Are Planets Spherical? - Alain Goriely
- Also: The Shape of Gravity: Why On Earth Are Planets Spherical?
- Also: The Shape of Gravity: Why On Earth Are Planets Spherical? - Alain Goriely - Gresham College Lectures
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