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Astronomy Cast, episode 338, Copernicus.

Welcome to Astronomy Cast, our weekly facts based journey through the cosmos,

who will help you understand only what we know, but how we know what we know.

My name is Fraser Cain, I'm the publisher of the universe today, and with me,

is Dr. Pamela Gay, a professor at Southern Illinois University Edwardsville,

and the director of CosmoQuest.

How am I doing?

I'm doing well, how are you doing Fraser?

Good, so just want to give people a preview.

You were going to try and go to the LPSC conference, the Lunar Planetary Science Conference,

but you weren't able to make it, so we're going to bring a ringer next week

to help us out.

That's going to be Saundi Sprigman from the Air Ascibo Observatory,

who knows all things, planets, planetary lunar science,

and zapping things with asteroids.

She's super.

Yes.

And just another reminder of the upcoming Hangout, Athon.

April 26th, 27th.

We are going to be invading my attic,

...