Oh, hum, um, another 700 new worlds confirmed 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. We live in amazing times.

Another 715 exoplanets have been confirmed

by the team behind the Kepler spacecraft. We'll visit with Jason Rowe, a member of that team.

Have you seen Bill Nye's selfie with Neil Degrass Tyson and the President of the United States?

We'll talk with him about it. Bruce Betts is waiting in the

wings for what's up as the Planetary Society senior editor takes the stage. That's

Emily Lacuala. Emily more pretty pictures in this relatively new entry in the blog at planetary.org

some really pretty pictures of craters and I guess like lightning meteors can

hit in the same place twice? Well they can and it looks

like that's what's happening with these craters that I'm showing in this blog

entry but in fact that is not the explanation that scientists think explains

how these craters within craters formed.

We're actually looking at an impact into a layered surface on the moon that happens all the

time because you have this broken up stuff called regolith on top of bedrock.

When an impactor hits that, it's very easy to blast away the loose dirt, the loose soil

and regolith.

It's much harder to blast away solid rock and so what you wind up with a big

crater with a flat floor and then a smaller crater in the bottom of that flat floor and that's because

of the layers in the subsurface. Now on Mars the layers are caused by something else in the sub surface. Now on Mars the layers are caused by something else and

the in the blog entry I explain how you can tell that in this particular location on

Mars that the layering is caused by ice in the Martian subsurface which is always

...