Using mid-infrared data acquired by Moons and Jupiter Imaging Spectrometer (MAJIS) aboard the European Space Agency’s JUpiter ICy moons Explorer (JUICE) spacecraft during the 2024 lunar flyby, we retrieved lunar surface temperature and effective emissivity at high spatial and spectral resolution. By comparing three independent thermal-retrieval methods, we confirmed the main mare–highland contrasts and showed how roughness and observing geometry shape the infrared signal, providing a methodological test case for future MAJIS studies of Jupiter’s icy moons.

Comprehensive analysis of geomagnetic storms from 23–25 March, 23–25 April, 4–6 November 2023, and  10–13 May 2024, reveals that solar wind parameters, geomagnetic activity, Joule heating, and Prompt Penetration Electric Fields significantly influence ionospheric Total Electron Content variations, Equatorial Ionization Anomaly crest formations, and post-sunset plasma irregularities. The storms highlighted the importance of inter-hemispheric asymmetries in Joule Heating, which affected the distribution and magnitude of ionospheric disturbances.

During its first Earth flyby, the JUpiter Icy Moons Explorer (Juice) spacecraft acquired observations over the Western Pacific. We identify several gaseous compounds (O₂, H₂O, CO₂, O₃, CH₄, N₂O), liquid/ice clouds over the ocean and atmospheric waves at high altitudes. We find good agreement with similar observations of Earth-orbiting PRISMA spectrometer. This study helps in planning future observations from the Moon and Jupiter Imaging Spectrometer (Majis) when it comes to the Jupiter system.

The Submillimetre Wave Instrument (SWI) aboard the Juice mission is a sophisticated and first-of-its-kind payload. SWI is designed to support the diverse science objectives of the Juice mission targeting Jupiter's middle atmosphere, icy-moon's exospheres as well as near sub-surface thermophysical properties. This presents significant planning, operations and commanding challenges which are described in this paper in the context of the Lunar and Earth Gravity Assist (LEGA).

Terrestrial lightning has been spectroscopically observed from Juice (JUpiter ICy moons Explorer) spacecraft, for the first time from space in a wide wavelength range. Though not detected by ground sensors, Juice confirmed neutral atomic oxygen and nitrogen emissions, with energies and temperatures consistent with average lightning. This observation is a benchmark for Jupiter, a primary Juice target, where simultaneous hydrogen emissions in different wavelengths could identify lightning.

Auroras, the natural lights seen in Earth's sky near the poles, are shaped by both Earth's and the solar wind's magnetic fields, as well as charged solar particles. This study examines how auroras change when the solar wind's magnetic field is dawn-dusk oriented. Daytime observations are challenging due to sunlight, so we developed a method to further separate auroras from background light. In summer, auroras shift east or west with/against the solar wind's magnetic field.

In this paper, we propose a method for identifying anomalous electromagnetic phenomena in the ionosphere before earthquakes, contributing to earthquake prediction research. By analyzing satellite data from the China Seismo-Electromagnetic Satellite and applying a decomposition technique, we identify significant electric-field disturbances prior to the May 11, 2023, Tonga Islands earthquake, supporting studies of seismic precursors.

Space plasmas often deviate from the usual thermal pattern assumed in most models. Using the standard Kappa distribution, we derived how this non-thermal energy spread alters electrical flow, heat transfer, and particle motion. We found that stronger deviations lower collision rates and enhance transport coefficients, while normal behaviour returns in the thermal limit, which improves our insight into space environments.

We investigate high-latitude medium scale traveling ionospheric disturbances (MSTIDs) over European Incoherent Scatter (EISCAT)-3D site. Using Hankasalmi radar data during solar max & min years of solar cycles 23 & 24, we observed that MSTIDs normally propagate equatorward with velocity and period of 50–150 m s^-1 and 30–60 minutes, respectively. Along with seasonal variation, MSTIDs showed dependency on solar activity as well as on northward and southward interplanetary magnetic field (IMF) Bz.

A transatlantic scientific balloon flight (TRANSAT) was conducted in June 2024. The TRANSAT balloon floated in the stratosphere at approximately 40 km altitude between Sweden and Canada for about 4 days. An optical imager was installed on the TRANSAT balloon to study noctilucent cloud (NLC). Nearly continuous observations of NLC were obtained during the entire flight. A complex NLC structures exhibiting different motions were found to result from wind rotation with altitude between 80 and 94 km.