Saturn has a fuzzy core, spread over more than half the planet’s diameter

A wave in one of the rings reveals the size and composition of the planet’s core

planet Saturn

Minute ripples in the rings of Saturn, seen in this 2010 image from the Cassini spacecraft, are helping astronomers deduce details about the planet’s hidden core.

Cassini, JPL-Caltech/NASA, Space Science Institute

One of Saturn’s rings has revealed properties of its core, hidden deep beneath the planet’s golden atmosphere.