The work began with locating these particles, tracing their origins, and then connecting them to specific solar events, including intense solar flares and coronal mass ejections (CMEs). Understanding Solar Energetic ElectronsPrevious work had discerned that SEE events came in two varieties, solar flares and CMEs, which the new Solar Orbiter data provided a significant number of new examples for. “Thanks to Solar Orbiter, we’re getting to know our star better than ever,” says Daniel Müller, ESA Project Scientist for Solar Orbiter. “During its first five years in space, Solar Orbiter has observed a wealth of Solar Energetic Electron events. The paper, “CoSEE-Cat: a Comprehensive Solar Energetic Electron Event Catalogue Obtained from Combined In-situ and Remote-sensing Observations from Solar Orbiter,” appeared in Astronomy and Astrophysics on September 1, 2025.