Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 44, issue 2
Articles | Volume 44, issue 2
https://doi.org/10.5194/angeo-44-1093-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/angeo-44-1093-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 44, issue 2
Regular paper
 | 
15 Oct 2026
Regular paper |  | 15 Oct 2026

Ultraviolet observations of the Earth and Moon during the JUICE Lunar-Earth flyby

Philippa M. Molyneux, Michael W. Davis, Rohini S. Giles, Thomas K. Greathouse, Kurt D. Retherford, Maarten H. Versteeg, Sue A. Ferrell, Tracy M. Becker, G. Randall Gladstone, Bradley J. Trantham, Joshua A. Kammer, Matthew A. Freeman, and Steven C. Persyn

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Short summary
We describe observations of the Earth and moon performed by the ultraviolet spectrograph (UVS) on the European Space Agency’s JUICE mission during a lunar-Earth flyby in 2024. JUICE-UVS observed UV sunlight reflected by the moon’s surface, and atmospheric emissions at the Earth. The observations provide the first opportunity to test the UVS response to planetary targets and demonstrate the types of measurements to be performed in the 2030s, when JUICE will explore Jupiter and its icy moons.
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The first-ever lunar–Earth flyby: a unique test environment...