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Double trouble: Solar Orbiter traces superfast electrons back to Sun

Written by  Monday, 01 September 2025 06:00
Graphic indicating how Solar Orbiter let us see the connection between energetic electrons in space and their sources on the Sun

The European Space Agency-led Solar Orbiter mission has split the flood of energetic particles flung out into space from the Sun into two groups, tracing each back to a different kind of outburst from our star.

Solar Orbiter is a space mission of international collaboration between ESA and NASA, operated by ESA.

Notes for editors

CoSEE-Cat: a Comprehensive Solar Energetic Electron event Catalogue obtained from combined in-situ and remote-sensing observations from Solar Orbiter’ by A. Warmuth et al. is published today in Astronomy & Astrophysics. The results are compiled in a publicly accessible online event catalogue, the Comprehensive Solar Energetic Electron event Catalogue (CoSEE-Cat): https://coseecat.aip.de/

More information on the capabilities and leading institutions for each of the instruments used in this study – EPD, STIX, EUI, RPW, Metis, SoloHI, SWA, and MAG – is available here: https://www.esa.int/ESA_Multimedia/Images/2020/01/Solar_Orbiter_s_instruments

More about Solar Orbiter: https://www.esa.int/Science_Exploration/Space_Science/Solar_Orbiter

More about Vigil: https://www.esa.int/Space_Safety/Vigil

More about Smile: https://www.esa.int/Science_Exploration/Space_Science/Smile

Visit ESA’s Space Weather Service Network: https://swe.ssa.esa.int/ or read more about ESA’s space weather activities: https://www.esa.int/Space_Safety/Space_weather

For more information, please contact

ESA Media Relations,


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