Growing Worlds: A structured conversational framework for accessible and rigorous exoplanet science communication

Science communication within planetary science and exoplanet research faces the challenge of balancing scientific rigour with accessibility in an increasingly fragmented and fast-moving information ecosystem. While short-form communication dominates many online platforms, long-form conversational media offer opportunities for deeper engagement and more nuanced discussion of scientific research and methodology.

We present Growing Worlds, an international podcast focused on exoplanet science and planetary exploration, designed around a structured conversational framework aimed at improving accessibility without sacrificing scientific accuracy. A defining feature of the project is its explicit focus on early-career researchers (ECRs), who are placed at the centre of the conversation as scientific contributors, communicators, and representatives of the next generation of planetary scientists.

Episodes feature a single ECR interviewed by two complementary co-hosts: an active exoplanet researcher and a professional science communicator with experience across podcasting, radio, and television. This dual-host structure helps bridge scientific depth and audience accessibility, allowing discussions to remain technically rigorous while approachable to non-specialist listeners. Conversations explore not only scientific results, but also the motivations, uncertainties, methodological challenges, and collaborative nature of planetary science research.

A central aspect of the project is the creation of a “safe-space” communication environment, in which guests are actively involved in the editorial process and final approval of published material. This approach has proven particularly valuable for ECRs with limited prior experience in public communication, supporting confidence and communication skills while maintaining scientific accuracy and authenticity.

By foregrounding ECR voices, the podcast strengthens international connections within the planetary science community while also creating a stronger point of identification for STEM students and aspiring researchers. This helps demystify research careers and encourages broader engagement with scientific pathways and academic aspirations.

We present the design philosophy behind the project, the motivations that shaped its format, the communication and editorial strategies adopted throughout production, and the lessons learned during its development. We also discuss the practical outcomes of the initiative, including audience engagement, the involvement of researchers from multiple countries and institutions, and the role of the podcast in supporting visibility, confidence, and communication skills among early-career scientists.