Recorded live on 28 September 2023. The Apollo missions showed scientists that the craters on the Moon were from impacts rather than volcanoes, overturning previously held hypotheses. Now, new research using data collected by China's Chinese Chang’E 1 and 2 orbiters has discovered a hot spot under the surface. Using an instrument that made observations at microwave wavelengths, the team mapped out temperatures and found one particular suspected volcano, known as Compton-Belkovich, glowed in the microwave.    However, surface evidence shows the volcano last erupted about 3.5 billion years ago, and the heat is coming from radioactive elements in the solid rock. That radioactivity led scientists to conclude that under the surface lies a large chunk of granite - magma that cooled underground - providing evidence for the most Earth-like volcanism found on the Moon to date.   Join planetary astronomer Dr. Franck Marchis as he discusses these interesting new findings with lead author Dr. Matt Siegler, Senior Scientist at the Planetary Science Institute.  Press release:  https://www.psi.edu/blog/evidence-of-new-volcanic-process-on-moon-discovered-pr/   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.  Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too!  Every bit helps! Thank you! ------------------------------------ Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations.  Thank you! (Haven't donated? It's not too late! Just click!) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.