It is with great sadness that the scientific community mourns the passing of Dr. Volker Bothmer, a distinguished physicist, a visionary leader in solar and heliospheric research, and a passionate educator who brought the wonders of space closer to the public.
Born in 1961, Dr. Bothmer dedicated his life to understanding the complex relationship between our Sun and Earth. His academic journey began at the Georg-August-Universität Göttingen, where he earned his Physics Diploma in 1989 and his doctorate in 1993. Following a formative period as a Max-Planck Scholar and later as an ESA Research Fellow at ESTEC, Dr. Bothmer returned to the University of Göttingen in 2005. There, as the head of the research group for the Physics of the Sun, Heliosphere, and Space Weather at the Institute for Astrophysics, he established himself as a preeminent expert in his field.
Dr. Bothmer’s professional legacy is defined by his instrumental role in some of the most significant international space missions of the modern era. He was a driving force in the NASA STEREO and Solar Probe Plus missions, serving as a project lead for German contributions and a Co-Investigator for key instrumentation, including the Wide-field Imager for Solar Probe (WISPR). As the coordinator of the EU FP7 project “AFFECTS,” he was a pioneer in the study of space weather, consistently working to bridge the gap between complex theoretical physics and the practical protection of our technological infrastructure. He was an excellent space physicist who made truly significant impacts in his field. Dr. Bothmer provided the observational foundation and key interpretation of the flux rope structure of CMEs, which has become the state of the art in our current understanding and modeling of CMEs. His studies paved the way for 3D reconstructions of flux ropes embedded in CMEs and for estimates of their geoeffectiveness based on the hemispheric empirical relation he discovered. These results now form the basis for many space weather forecasting tools.
Beyond his rigorous research, Dr. Bothmer possessed a rare gift for communication. He believed deeply that science should be accessible to all. Whether he was training PhD students, hosting workshops for high school teachers, or developing 3D visualizations for planetariums, he inspired generations of students and citizens alike. His work with the SIMONE network and his frequent public appearances in media and planetariums made him the face of space weather science in Germany, turning abstract solar phenomena into compelling narratives for the public. Dr. Bothmer’s eagerness and enthusiasm in discussing recent and past research results and thinking out of the box is inspiring, especially for young colleagues.
An active member of the international scientific community, Dr. Bothmer served on countless advisory boards, review panels for NASA and ESA, and as an editor for leading scientific journals. He was a tireless collaborator, fostering exchange programs and building bridges between universities and research institutes across Europe, the United States, and China.
Dr. Bothmer leaves behind a profound void in the halls of the University of Göttingen and among his colleagues worldwide. His legacy endures in the missions he helped shape, the students he mentored, and the countless individuals he inspired to look toward the Sun with curiosity and awe. He delivered to friends and colleagues so much. He was a man who gave. He will be deeply missed in both his personality and his professional guidance, but he will remain in our memories forever.
Our thoughts are with his wife Gudrun, his sons Hannes and Tobias, and his entire family.
Submitted by Manuela Temmer, Günther Reitz, Iulia Chifu