Why The Renewed Interest in Uranus?

Why The Renewed Interest in Uranus?

From The Multiverse Employee Handbook by Robb Corrigan

March 10, 2026 · 35 min · Season 3 · Episode 23

About this episode

This episode explores the recent discoveries about Uranus and challenges the long-held classification of the planet.

Uranus has been rolling through the solar system on its side for four and a half billion years, confidently labelled an ice giant since a single spacecraft spent six hours there in 1986 — and until very recently, nobody had particularly strong grounds to argue otherwise. Then 2025 happened. 🎧 Love the show? Help us improve in 2 minutes: https://tally.so/r/nr1evM The James Webb Space Telescope found a moon that the original mission missed entirely, sitting quietly in the inner system at roughly ten kilometres across, invisible to everything previously aimed at it. And two astrophysicists in Zürich published a paper suggesting that beneath that hydrogen-helium atmosphere, Uranus may be predominantly rock rather than ice — making the classification we've built forty years of textbook confidence around a historical artefact rather than a robust physical fact. In this episode, we explore what we actually know about the seventh planet, how planetary interiors are modelled when you cannot visit them, why the magnetic field has always been quietly awkward, and what it means for thousands of exoplanets across the galaxy if our local reference point turns out to have been the wrong kind…

People in this episode

Host: Robb Corrigan

Topics covered

  • Uranus
  • planetary science
  • astrophysics
  • space exploration
  • exoplanets

Keywords

  • Uranus
  • ice giant
  • James Webb Space Telescope
  • planetary interiors
  • exoplanets

Mentioned in this episode

Organizations: NASA, NASA/Webb, Zürich

Books & works: Morf & Helled, 2025: Icy or Rocky? New Interior Models of Uranus and Neptune

Places: Uranus

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