The search for extraterrestrial polluters this week on planetary Radio. Radio. Welcome to the Travel Show that takes you to the Final Frontier.

I'm at Kaplan of the Planetary Society and I think you're going to enjoy this one.

Henry Lynn is going to tell us about his team's work on finding advanced aliens

not from their radio signals, but the CFCs in their atmospheres. Bill Nye looks at the real

benefits of an asteroid retrieval mission and Bruce Betts will be along with news

of a pretty amazing conjunction in the night sky. It's always nice to begin with senior editor

Emily Lachto-Wala.

Emily I want to get to new horizons in a moment but first of all I mean it was just

last week that we talked about Rosetta nearing the comet and now it's there.

Yeah and it's certainly very cool looking.

You know it's a very strange looking object, it's clearly two separate objects that are joined together,

although I think it's an open question, whether it's two originally separate objects that

joined together or two objects that are going to become separate in the future that

originally started out as one. I don't think we know that yet and it's I'm looking

forward to Rosetta trying to figure that out. And it's an interesting mix of

the familiar and the strange. If you look at a picture of all six comets that we visited up close and taken pictures of,

this now makes it four out of six that appeared to have this kind of double-lobed shape, so it's actually

a fairly common shape. and some of the features on

the surface really remind me of like the circular features we saw on Comet Temple

1 also of the depression type features that we saw on Cometville too.

So it's really exciting to begin to see enough objects

that we can sort of divide things into classes

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