This is planetary radio. What would your voice sound like on Mars? Here's what you'd hear from Ray Bradbury.

This is a Ray Bradbury calling to you from the planet Mars.

Yes, it's really Ray Bradbury's voice, electronically modified to simulate what he would sound like

on the surface of Mars if he could do such a thing without a space suit

but you'd also want a Mars microphone wouldn't you?

Well, there really is one, and it's waiting for a ride to the red planet.

We'll use an Earthbound microphone to hear from Greg Delore, a senior fellow at Berkeley's Space Sciences lab about this and some of his other projects.

New moons, water on mercury, and a new trivia contest when Bruce Betts drops in, and Emily answers a question about the wild and

crazy colors of Jupiter's moon I. So much more than a chronicle of Mars on

today's planetary radio.

Here I am, Ray Brad relates to the five Mars.

Thank you.

Hi. Hi, I'm Emily Lochuwala with questions and answers. A listener asked what makes

Iyo yellow? The simple answer is that Jupiter's innermost moon IOS surface is yellow because of sulfur.

But this answer is not as simple as it seems.

The bright sulfur yellow color that we are familiar with should only occur at the temperatures

and pressures common on the Earth's surface.

If yellow sulfur on Earth is heated, it turns orange.

If it is cooled, the color fades to white, getting brighter and whiter as it cools.

The surface of most of Ayo is so cold, minus 150 degrees Celsius, that sulfur on Iyo should

be brilliantly white, but IO is most definitely yellow.

Even stranger, Galileo Mission scientists observe that when iO passes through Jupiter's shadow,

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