also our guest this week, hannah kerner who is the luna h-map software lead. what does that mean, hannah? lead? >> i am in charge of designing the flight software that runs the spacecraft and all of the instruments on board the spacecraft, as well as being primarily in charge of writing that software. >> let's talk about that for a minute, because asu right now on the cutting edge, this is the next platform for nasa, the next rocket that will take an array of satellites into different projects around wherever they go. hydrogen. >> right. >> why is that important, to try to see where hydrogen deposits might be? >> geologically, we aren't really sure why there's a lot of deposits of hydrogen at the poles. we understand that the pole sort of wobbles over time and we concentrate water at the poles of any planet that has water on it. but the moon is very dry, from what we know. passing asteroids or comets might shed off water, and that would sort of get deposited in a blanket uniformly around the moon, and it gets redistributed over time. so you get meteorites that