Could a single impact have briefly turned Umbriel into a cryovulcanic world?

We'll learn more this week on Planetary Radio.

I'm Sarah al-Ahmed of the Planetary Society, with more of the human adventure across our solar

system and beyond. Today we're going to explore one of the most overlooked moons in the outer

solar system, Umbriel. It's a dark and heavily cratered satellite of Uranus that's long

been considered geologically dead, but a bright ring inside one massive impact crater may tell a very different story.

My guest is Adin Denton, NASA Postdoctoral Program Fellow at the Southwest Research Institute,

and lead author on a new study in the Journal of Geophysical Research Planets.

Her team takes a closer look at the Wanda Impact Crater on Umbriel and asks whether this

ancient collision briefly awakened a dormant moon, triggering cryovulcanic activity from beneath

its ice shell.

Then in What's Up, I'll join Bruce Betts, our chief scientist at the Planetary Society, to talk

about one of the key physical

mechanisms that can keep ocean worlds from freezing solid, tidal heating that's driven by orbital

resonance. If you love planetary radio and want to stand formed about the latest space discoveries,

make sure you hit that subscribe button on your favorite podcasting platform. By subscribing,

you'll never miss an episode filled with new and awe-inspiring ways to know the cosmos and our place within it.

Before we take a mental trip to the outer solar system, I have a quick note. Our spring

membership drive is happening right now. We're working to welcome 250 new members to the Planetary Society,

people who believe space science is worth fighting for.

Memberships start at just $4 a month,

and it helps power everything we do here at the Planetary Society,

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