To celebrate the 56th anniversary of the first moon landing, CERN is hosting the STELLAR science festival. This event offers the chance to meet astronauts, Nobel laureates, and renowned scientists, delving into how astrophysics and particle physics impact fields such as healthcare, climate modeling, and natural disaster management. The festival includes live music and hands-on activities suitable for all ages. Attendees will have the opportunity to hear from several Nobel Prize winners and astronauts, with some participating remotely. Organized by IUPAP, the Swiss Physical Society, the University of Geneva, and CERN, STELLAR is part of the 2025 International Cosmic Ray Conference. Admission is free, though advanced registration is recommended to attend the talks.