In the 1970s, Apollo-era astronauts left a seismic experiment on the moon. Now, new analysis of 30-year-old data from the Apollo Passive Seismic Experiment may give new insights into the lunar core. Researchers report that the lunar core may be much like the core of the Earth, with a solid inner core and molten outer core. However, outside the moon's outer core, the moon also has a thick partial melt layer, according to the new analysis. We'll talk about what the researchers did, and what they discovered.
Produced by Annette Heist, Senior Producer