The Planeterrella: A planetary auroral simulator

Jean Lilensten, Laurent Lamy, Carine Briand, Mathieu Barthélémy, Baptiste Cecconi

This article presents a plasma physics experiment which makes it possible to produce polar lights. The experiment, named Planeterrella, involves shooting electrons onto a magnetised sphere placed in a vacuum chamber. Inspired by Kristian Birkeland’s Terrella, but with several different configurations and technical improvements, the experiment allows the user to simulate and visualise simple geophysical and astrophysical situations. Several Planeterrellas are now used across Europe and the USA. The design of the original experiment and the expertise of its first authors are shared freely with any public institute and are outlined in this article.



Engagement as a Threshold Concept for Science Education and Science Communication

Merryn McKinnon & Judith Vos

Science communication and science education have the same overarching aim—to engage their audiences in science—and both disciplines face similar challenges in achieving this aim. Knowing how to effectively engage their ‘audiences’ is fundamental to the success of both. Both disciplines have well-developed research fields identifying best practice. However, there seems to be an impediment in putting this knowledge into practice, or even much sharing of knowledge between the 2 disciplines. Threshold concepts refer to concepts that are fundamental to thinking and practice in a discipline. In this paper, we argue that engagement is a threshold concept for both science education and science communication. Considering the vast amount of literature on science education and science communication, the focus in this paper is on recent recommendations rather than longstanding, more general notions, providing a contemporary view. This paper illustrates how engagement fulfils the characteristics of a threshold concept for both disciplines and highlights how the 2 fields could assist each other. The purpose of this paper is to spark new conversations and sharing between the 2 disciplines, with the use of threshold concepts as a vehicle for enabling collaboration and progress.


Bridging the Research-Practice Gap in Climate Communication: Lessons From One Academic-Practitioner Collaboration

Hahrie Han, Neil Stenhouse

Recent evidence suggests that a research-practice gap exists for climate change communication, whereby practitioners are not making optimal use of knowledge that exists and scholars are not answering questions most relevant to practitioners. Closer collaboration between academics and practitioners is one way to close this gap. We recount our collaboration with a group of Sierra Club staff and volunteers working to improve their climate advocacy and organizing activities. From our collaboration, four ways of improving future collaborations emerged, relating to broad versus narrow applicability of communication recommendations, strategy versus tactics, academic versus experiential knowledge, and proactive versus reactive support.