Fire and ice with volcanologist Rosalie Lopez this week on planetary radio. I'm Matt Kaplan of the Planetary Society.

She has discovered more volcanoes than any other human.

Rosalie will tell us about her current research and much more.

My weekly conversation with Bill Nye runs from climates on other worlds to the landing of

curiosity on Mars and Bruce Bats will help me welcome another space celebrity who

arrives with his own random space fact. First in today's lineup is the editor of the

Planetary Society's blogs Emily Lochuwala. Emily welcome back from vacation

people may have noticed that there haven't been as many blog entries as usual because you've

been enjoying yourself a well-earned vacation. I guess that's going to change beginning.

You told me with a story that may be up by the time people hear this about the discovery of yet another moon

way out there at Pluto.

Yeah, I have to say this is the biggest news that seems to have happened on the two weeks

that I was away on vacation, although I actually heard about this quite a while ago at a new Horizons

team meeting about the science of Pluto and other icy worlds out there in the distant solar

system.

So yes, Pluto has a fifth moon. It has one large moon Sharon and then at least four smaller

moons. They're named Hydra and Nix and then there's P4 and P5. we do not have names yet.

You know, it's actually quite likely that there are more things lurking out there.

Once you start discovering smaller and smaller things, probably Pluto actually has some kind of

ring system, almost like Uran Uranus where they could be

discontinuous rings or continuous rings and there may be

the largest clumps or bodies out there that could be even more moons for

...