The very latest developments in the world of Earth science with Roland Pease, recorded at the American Geophysical Union (AGU) meeting in New Orleans, where thousands of Earth, atmospheric, ocean and hydrologic scientists come together to promote discovery in Earth science for the benefit of humanity.

Roland talks to Andy Rivkin, planetary astronomer at the Johns Hopkins University Applied Physics Laboratory, about planetary defence from asteroids, including the small potential for asteroid 2024 YR4 to hit the moon in 2032.

We hear from Craig DeForest, principle investigator for the PUNCH mission (Polarimeter to Unify the Corona and Heliosphere), which is a constellation of four small satellites that aim to learn how the Sun's corona becomes the solar wind. And Lara Waldrop, principle investigator of the Carruthers Geocorona Observatory, discusses the Earth's exosphere which plays an important role in Earth’s response to space weather caused by the Sun.

We also talk lunar earthquakes, or moonquakes, and plans to put seismometers on the moon to measure them with Philippe Lognonné, professor at Université Paris Cité and planetary seismologist at Institut de Physique du Globe de Paris, and Ceri Nunn, lunar seismologist from NASA Jet Propulsion Laboratory.

Presenter: Roland Pease Producer: Jonathan Blackwell