Oh, This is a bonus episode featuring remastered audio from an older episode.

Expect more stories of the people behind the missions in season 18 coming in September.

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Astronomy cast, episode 172 from Monday, January 11, 2010, William Herschel.

Welcome to Astronomy cast, our weekly facts-based journey through the Cosmos,

where we help you understand not only what we know,

but how we know what we know. My name is Fraser Kane, I'm the publisher of

University today and with me is Dr. Pamela Gaye Professor at Southern Illinois University Eversville.

Hey Pamela, how you doing?

I'm doing well, how are you doing Fraser? Good good it's cold

wet but that's you know it's kind in the winter so we're cold sunny. My wife is down in

Cancun right now so yeah, yeah, I get the call every now and then telling me how much fun she's having.

But she's back tomorrow.

So she gets to join us in the winter again.

Right, so ancient astronomers knew of five planets, Mercury, Venus, Mars, Jupiter, and Saturn. Six of you count Earth. And then in 1781, William Herschel discovered an entirely new planet.

Uranus, boosting the number of planets to seven.

Let's learn about Herschel, his equipment, his discoveries, and his sister Caroline and accomplished astronomer all in time. his

equipment, his discoveries, and his sister Caroline, and accomplished astronomer all on our own.

All right, we're going to take another break.

And we're back.

All right, so Pamela, we've talked a bit about Uranus and the discovery, but so why don't we just start talking a bit about

...