The Shape of Gravity: Why On Earth Are Planets Spherical?

We often take for granted that planets, shaped by the force of gravity, are spherical. However, a closer look reveals that the Earth is not a perfect sphere—it is slightly squashed. But is it squashed like a pumpkin or more like a peanut? And is the sphere truly the only possible shape for a planet? As planets grow larger and must sustain increasingly extreme forces, can we still assume they maintain a spherical shape? These seemingly simple questions have fascinated scientists and mathematicians since the time of Newton, giving rise to profound mathematical theories that deepen our understanding of the universe.

A lecture by Professor Alain Goriely.

This event is also available to watch live online. To register, visit: https://www.gresham.ac.uk/whats-on/shape-gravity

Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham College's mission, please consider making a donation: Donate Today | Gresham College

Know what’s Happening Next — before everyone else does.

Get App

Host or Publisher Gresham College