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Astronomy Cast Episode 279 from Monday, November 5, 2012, the Hubble constant.

Welcome to Astronomy Cast, our weekly facts based journey through the cosmos to help you understand not only what we know, but how we know what we know.

My name is Fraser Cain, I'm the publisher of University Day, and with me is Dr. Pamela Gaye, a professor at Southern Illinois University, Embertsville.

Hey Pamela, how are you doing?

I'm doing well. How are you doing, Fraser?

Good global warming is treating us really well here on the west coast today. It's beautiful. I will learn shorts and t-shirts in the middle of November.

We're recording this episode a little late, so it's still almost December and still the weather is beautiful.

We have the exact same thing here. I was riding my horse outside in short sleeves yesterday, and me and the horse were both sweaty, and that doesn't normally happen outside.

Yeah, we're destroying the environment in ways that allow t-shirts in November.

Yeah, thanks, goal warming.

As always, we are recording this episode of Astronomy Cast as a live Google Plus Hangout, and if you want to watch us record live, trust me.

It's so much better than what you do is you circle Astronomy Cast on Google Plus, and then you'll get a event notification in your stream, in your calendar of when we're going to record our next episode, and then you can just watch us live.

And ask your questions, and we stick around, and interact with the fans, and it's super fun.

So it's a really great way. If you really enjoy Astronomy Cast, this is a great way to take it to the next level.

Alright, let's rock.

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So when Edwin Hubble observed that distant galaxies are speeding away from us in all directions, he discovered the reality that we live in an expanding universe.

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