This is planetary radio. Hello and welcome back everyone I'm Matt Kaplan. Last week it was Fire with the volcanoes of I. This week ice as we visit the frozen

surfaces of Europa and Mars. Our guest is Dr Elizabeth Turtle, an expert on this very cool topic.

Red marks the spot on Jupiter in this week's What's Up with Bruce Betts?

Bruce will have his new trivia contest question for you too. We begin though with

Emily whose eye is on the mysterious moons of Saturn. That's planetary radio running rings

around all the other space radio shows.

Let's get started. Hi, I'm Emily Lochuwala with questions and answers.

Did you know that Jupiter is not the only planet with an orbiting family of diverse satellites?

Thanks to the successful Galileo mission to Jupiter,

we now recognize that the Galilean satellites of Jupiter are each distinct worlds with unique geology and history.

But these are not the only such worlds yet to be visited in the outer solar system. The Cassini spacecraft will soon arrive at Saturn to study icy moons first observed by its namesake scientist Giovanni Domenico Cassini

late in the 17th century, Iapetus, Ria, Dioni, and Tethys.

To find out what we know about these distant icy worlds, stay tuned to planetary

radio. Elizabeth Turtle is our guest on planetary radio this week.

She is a senior research associate in the Department of Planetary Sciences at the

Lunar and Planetary Lab, University of Arizona, that's in

Tucson. She has a connection to the Planetary Science Institute too, which is not a

coincidence in this case because it was Bill Hartman, one of our previous guests about a month

ago, who said, hey, I have this terrific young scientist who knows a lot about ice elsewhere

in the solar system, and you really ought to talk to her and turns out that that's

Elizabeth or should I say Zibi is it be welcomed planetary radio

hi thank you how did you get that uh... nickname

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