Spinning the Core

Spinning the Core

Laboratory dynamos attempt to generate magnetic fields the way planets and stars do

By Alexandra Witze, 15:28 PM May 2, 2013

Daniel Lathrop spent seven years and $2 million building the stainless steel sphere in his laboratory. It’s two spheres, actually — nestled one within the other like a pair of Russian dolls. Only these dolls contain 12 tons of molten metal and spin independently at astonishing speeds.


With his contraption, Lathrop, a physicist at the University of Maryland in College Park, hopes to re-create the Earth’s spinning metal heart. As the planet rotates on its axis, electrically conducting liquid ir...

Source URL: https://www.sciencenews.org/article/spinning-core